Add to built in privs test

x-pack/docs/build.gradle

@@ -1,5 +1,3 @@
-import org.elasticsearch.gradle.internal.info.BuildParams
-
 apply plugin: 'elasticsearch.docs-test'
 apply plugin: 'elasticsearch.rest-resources'
 
@@ -29,18 +27,6 @@ restResources {
   }
 }
 
-// TODO: Remove the following when the following features are released. These tests include new privileges only available under feature flags
-//  which require snapshot builds:
-// * Data Stream Lifecycle. manage_data_stream_lifecycle privilege is only available with dlm_feature_flag_enabled set
-// We disable these tests for snapshot builds to maintain release build coverage.
-tasks.named("yamlRestTest").configure {
-  if (BuildParams.isSnapshotBuild()) {
-    systemProperty 'tests.rest.blacklist', '*/get-builtin-privileges/*'
-  } else {
-    systemProperty 'tests.rest.blacklist', ['*/create-cross-cluster-api-key/*', '*/update-cross-cluster-api-key/*'].join(',')
-  }
-}
-
 testClusters.matching { it.name == "yamlRestTest" }.configureEach {
   extraConfigFile 'op-jwks.json', project(':x-pack:test:idp-fixture').file("oidc/op-jwks.json")
   extraConfigFile 'idp-docs-metadata.xml', project(':x-pack:test:idp-fixture').file("idp/shibboleth-idp/metadata/idp-docs-metadata.xml")

x-pack/docs/en/rest-api/security/get-builtin-privileges.asciidoc

@@ -128,6 +128,7 @@ A successful call returns an object with "cluster" and "index" fields.
     "index",
     "maintenance",
     "manage",
+    "manage_data_stream_lifecycle",
     "manage_follow_index",
     "manage_ilm",
     "manage_leader_index",