Refactor: Simplify signature of TurboModuleBinding::getModule

Summary:
Previously, the signature of TurboModuleBinding::getModule was

https://www.internalfb.com/code/fbsource/[839b8756fb58bf8cfa38a7d9f90b4b2b99889a37]/xplat/jsi/jsi/jsi.h?lines=111-112

**Problem:** TurboModuleBinding::getModule couldn't be called from [global.nativeModuleProxy](https://www.internalfb.com/code/fbsource/[cacaf79996c24c52fcedc90933b77dcf3411cf54]/xplat/ReactNative/venice/ReactInstance.cpp?lines=25-46) (i.e: jsi::HostObject::get), where only the prop name was available:

https://www.internalfb.com/code/fbsource/[839b8756fb58bf8cfa38a7d9f90b4b2b99889a37]/xplat/jsi/jsi/jsi.h?lines=133

## Changes
This diff simplifies the signature of TurboModuleBinding::getModule to accept only what it needs: a jsi::Runtime, and moduleName

This way, TurboModuleBinding::getModule can be called from:
- jsi::HostFunction (for [global.__turboModuleProxy](https://www.internalfb.com/code/fbsource/[cc6106d532afd3f179b586d6acb4e99edb09bb96]/xplat/js/react-native-github/ReactCommon/react/nativemodule/core/ReactCommon/TurboModuleBinding.cpp?lines=34-48))
- **new:** jsi::HostObject::get (for [global.nativeModuleProxy](https://www.internalfb.com/code/fbsource/[cacaf79996c24c52fcedc90933b77dcf3411cf54]/xplat/ReactNative/venice/ReactInstance.cpp?lines=25-46)).

Changelog: [Internal]

Reviewed By: javache, cortinico

Differential Revision: D43993198

fbshipit-source-id: e1207a129b1033f96d2753c88d372bb7eb4364f3

ReactCommon/react/nativemodule/core/ReactCommon/TurboModuleBinding.cpp

@@ -44,7 +44,12 @@ void TurboModuleBinding::install(
               const jsi::Value &thisVal,
               const jsi::Value *args,
               size_t count) {
-            return binding.getModule(rt, thisVal, args, count);
+            if (count < 1) {
+              throw std::invalid_argument(
+                  "__turboModuleProxy must be called with at least 1 argument");
+            }
+            std::string moduleName = args[0].getString(rt).utf8(rt);
+            return binding.getModule(rt, moduleName);
           }));
 }
 
@@ -54,15 +59,7 @@ TurboModuleBinding::~TurboModuleBinding() {
 
 jsi::Value TurboModuleBinding::getModule(
     jsi::Runtime &runtime,
-    const jsi::Value &thisVal,
-    const jsi::Value *args,
-    size_t count) const {
-  if (count < 1) {
-    throw std::invalid_argument(
-        "__turboModuleProxy must be called with at least 1 argument");
-  }
-  std::string moduleName = args[0].getString(runtime).utf8(runtime);
-
+    const std::string &moduleName) const {
   std::shared_ptr<TurboModule> module;
   {
     SystraceSection s(

ReactCommon/react/nativemodule/core/ReactCommon/TurboModuleBinding.h

@@ -45,11 +45,8 @@ class TurboModuleBinding {
    * A lookup function exposed to JS to get an instance of a TurboModule
    * for the given name.
    */
-  jsi::Value getModule(
-      jsi::Runtime &runtime,
-      const jsi::Value &thisVal,
-      const jsi::Value *args,
-      size_t count) const;
+  jsi::Value getModule(jsi::Runtime &runtime, const std::string &moduleName)
+      const;
 
   TurboModuleProviderFunctionType moduleProvider_;
   TurboModuleBindingMode bindingMode_;