Face PersonDirectory argument type mismatch fix (Azure#21572)

* Fix Face PersonDirectory argument type mismatch

Update the Person related operations in PersonDirectory to consume
personId as GUID as opposed to string.
The change adheres to the existing pattern for Person Group and
Large Person Group, clarifies intended usage, and should reduce
confusion from the current discrepancy between returned GUIDs in
responses while the corresponding operation arguments are string.

* Fix person request type

* Fix AddPersonFace missing url in json

specification/cognitiveservices/data-plane/Face/preview/v1.0-preview/Face.json

@@ -2542,6 +2542,7 @@
           {
             "in": "query",
             "name": "start",
+            "format": "uuid",
             "type": "string"
           },
           {
@@ -2591,7 +2592,7 @@
             "name": "body",
             "required": true,
             "schema": {
-              "$ref": "#/definitions/EnrolledPerson"
+              "$ref": "#/definitions/EnrollmentRequest"
             }
           }
         ],
@@ -2640,6 +2641,7 @@
             "in": "path",
             "name": "personId",
             "required": true,
+            "format": "uuid",
             "type": "string"
           },
           {
@@ -2682,6 +2684,7 @@
             "in": "path",
             "name": "personId",
             "required": true,
+            "format": "uuid",
             "type": "string"
           }
         ],
@@ -2723,6 +2726,7 @@
             "name": "personId",
             "description": "Person id.",
             "required": true,
+            "format": "uuid",
             "type": "string"
           }
         ],
@@ -2753,7 +2757,7 @@
           "PersonDirectory"
         ],
         "summary": "Add a new face to person.",
-        "operationId": "PersonDirectory_AddPersonFace",
+        "operationId": "PersonDirectory_AddPersonFaceFromUrl",
         "produces": [
           "application/json"
         ],
@@ -2763,6 +2767,7 @@
             "name": "personId",
             "description": "Person id.",
             "required": true,
+            "format": "uuid",
             "type": "string"
           },
           {
@@ -2789,6 +2794,9 @@
             "name": "targetFace",
             "description": "Target face.",
             "type": "string"
+          },
+          {
+            "$ref": "../../../Common/Parameters.json#/parameters/ImageUrl"
           }
         ],
         "responses": {
@@ -2832,6 +2840,7 @@
             "name": "personId",
             "description": "Target person to get persistedFaceIds from.",
             "required": true,
+            "format": "uuid",
             "type": "string"
           },
           {
@@ -2879,6 +2888,7 @@
             "name": "personId",
             "description": "Person id.",
             "required": true,
+            "format": "uuid",
             "type": "string"
           },
           {
@@ -2893,6 +2903,7 @@
             "name": "persistedFaceId",
             "description": "Persisted face id to delete.",
             "required": true,
+            "format": "uuid",
             "type": "string"
           }
         ],
@@ -2934,6 +2945,7 @@
             "name": "personId",
             "description": "Target person to get face from.",
             "required": true,
+            "format": "uuid",
             "type": "string"
           },
           {
@@ -2948,6 +2960,7 @@
             "name": "persistedFaceId",
             "description": "Target person face id to get.",
             "required": true,
+            "format": "uuid",
             "type": "string"
           }
         ],
@@ -2989,6 +3002,7 @@
             "name": "personId",
             "description": "Target person to update face from.",
             "required": true,
+            "format": "uuid",
             "type": "string"
           },
           {
@@ -3003,6 +3017,7 @@
             "name": "persistedFaceId",
             "description": "PersistedFaceId created from Person Face Create",
             "required": true,
+            "format": "uuid",
             "type": "string"
           },
           {
@@ -3245,6 +3260,7 @@
             "in": "query",
             "name": "start",
             "description": "List persons from the least personId greater than the \"start\". It contains no more than 64 characters. Default is empty.",
+            "format": "uuid",
             "type": "string"
           },
           {
@@ -3339,6 +3355,7 @@
             "name": "personId",
             "description": "Valid PersonId created from Person Create.",
             "required": true,
+            "format": "uuid",
             "type": "string"
           },
           {
@@ -3694,6 +3711,7 @@
             "name": "personId",
             "description": "Person id.",
             "required": true,
+            "format": "uuid",
             "type": "string"
           },
           {
@@ -5218,7 +5236,8 @@
       "properties": {
         "personId": {
           "format": "uuid",
-          "type": "string"
+          "type": "string",
+          "x-nullable": false
         },
         "name": {
           "type": "string"
@@ -5233,7 +5252,8 @@
       "properties": {
         "personId": {
           "format": "uuid",
-          "type": "string"
+          "type": "string",
+          "x-nullable": false
         },
         "name": {
           "type": "string"
@@ -5248,7 +5268,8 @@
       "properties": {
         "personId": {
           "format": "uuid",
-          "type": "string"
+          "type": "string",
+          "x-nullable": false
         }
       }
     },
@@ -5268,7 +5289,8 @@
       "properties": {
         "persistedFaceId": {
           "format": "uuid",
-          "type": "string"
+          "type": "string",
+          "x-nullable": false
         },
         "recognitionModel": {
           "type": "string"
@@ -5283,13 +5305,15 @@
       "properties": {
         "personId": {
           "format": "uuid",
-          "type": "string"
+          "type": "string",
+          "x-nullable": false
         },
         "persistedFaceIds": {
           "type": "array",
           "items": {
             "format": "uuid",
-            "type": "string"
+            "type": "string",
+            "x-nullable": false
           }
         },
         "name": {
@@ -5342,7 +5366,9 @@
         "addPersonIds": {
           "type": "array",
           "items": {
-            "type": "string"
+            "format": "uuid",
+            "type": "string",
+            "x-nullable": false
           }
         }
       }
@@ -5365,7 +5391,9 @@
         "addPersonIds": {
           "type": "array",
           "items": {
-            "type": "string"
+            "format": "uuid",
+            "type": "string",
+            "x-nullable": false
           }
         }
       }
@@ -5391,7 +5419,8 @@
           "type": "array",
           "items": {
             "format": "uuid",
-            "type": "string"
+            "type": "string",
+            "x-nullable": false
           }
         }
       }
@@ -5401,7 +5430,8 @@
       "properties": {
         "personId": {
           "format": "uuid",
-          "type": "string"
+          "type": "string",
+          "x-nullable": false
         },
         "dynamicPersonGroupIds": {
           "type": "array",