Fix broken use_frameworks from React-bridging (#34011)

Summary:
`use_frameworks!` is broken again in react-native 0.69 because React-bridging. in the `use_frameworks!` mode, header structures are flattened, so `#include <react/bridging/CallbackWrapper.h>` is not reachable to the header. to somehow workaround the issue without touch React-bridging imports, the pr do these things:

- use `header_mappings_dir` to keep `react/bridging` header structure
- because the header structure is not default framework header structure, explicitly `HEADER_SEARCH_PATHS` is necessary.
- forward declare `CallbackWrapper` and use it internally in ReactCommon. so that we don't need to add `HEADER_SEARCH_PATHS` for React-bridging to every pods depending on `ReactCommon/turbomodule/core`, e.g. React-RCTSettings.podspec.

[iOS] [Fixed] - Fix use_frameworks! for 0.69

Pull Request resolved: https://github.com/facebook/react-native/pull/34011

Test Plan:
```sh
$ npx react-native init RN069 --version next
$ yarn ios
```

Reviewed By: cortinico, cipolleschi

Differential Revision: D37169699

Pulled By: dmitryrykun

fbshipit-source-id: 309c55f1c611a2fc3902a83e8af814daaf2af6a0

ReactCommon/React-bridging.podspec

@@ -5,7 +5,7 @@
 
 require "json"
 
-package = JSON.parse(File.read(File.join(__dir__, "..", "..", "..", "package.json")))
+package = JSON.parse(File.read(File.join(__dir__, "..", "package.json")))
 version = package['version']
 
 source = { :git => 'https://github.com/facebook/react-native.git' }
@@ -28,9 +28,10 @@ Pod::Spec.new do |s|
   s.author                 = "Facebook, Inc. and its affiliates"
   s.platforms              = { :ios => "12.4" }
   s.source                 = source
-  s.source_files           = "**/*.{cpp,h}"
-  s.exclude_files          = "tests"
+  s.source_files           = "react/bridging/**/*.{cpp,h}"
+  s.exclude_files          = "react/bridging/tests"
   s.header_dir             = "react/bridging"
+  s.header_mappings_dir    = "."
   s.compiler_flags         = folly_compiler_flags
   s.pod_target_xcconfig    = { "HEADER_SEARCH_PATHS" => "\"$(PODS_ROOT)/RCT-Folly\"",
                                "USE_HEADERMAP" => "YES",

ReactCommon/ReactCommon.podspec

@@ -32,7 +32,7 @@ Pod::Spec.new do |s|
   s.source                 = source
   s.header_dir             = "ReactCommon" # Use global header_dir for all subspecs for use_frameworks! compatibility
   s.compiler_flags         = folly_compiler_flags + ' ' + boost_compiler_flags
-  s.pod_target_xcconfig    = { "HEADER_SEARCH_PATHS" => "\"$(PODS_ROOT)/boost\" \"$(PODS_ROOT)/RCT-Folly\" \"$(PODS_ROOT)/DoubleConversion\" \"$(PODS_ROOT)/Headers/Private/React-Core\" \"$(PODS_ROOT)/Headers/Private/React-bridging\"",
+  s.pod_target_xcconfig    = { "HEADER_SEARCH_PATHS" => "\"$(PODS_ROOT)/boost\" \"$(PODS_ROOT)/RCT-Folly\" \"$(PODS_ROOT)/DoubleConversion\" \"$(PODS_ROOT)/Headers/Private/React-Core\" \"$(PODS_ROOT)/Headers/Private/React-bridging/react/bridging\" \"$(PODS_CONFIGURATION_BUILD_DIR)/React-bridging/react_bridging.framework/Headers\"",
                                "USE_HEADERMAP" => "YES",
                                "CLANG_CXX_LANGUAGE_STANDARD" => "c++17" }
 

ReactCommon/react/nativemodule/core/platform/ios/RCTTurboModule.h

@@ -16,7 +16,6 @@
 #import <React/RCTModuleMethod.h>
 #import <ReactCommon/CallInvoker.h>
 #import <ReactCommon/TurboModule.h>
-#import <ReactCommon/TurboModuleUtils.h>
 #import <string>
 #import <unordered_map>
 
@@ -27,6 +26,7 @@
 namespace facebook {
 namespace react {
 
+class CallbackWrapper;
 class Instance;
 
 typedef std::weak_ptr<CallbackWrapper> (

ReactCommon/react/nativemodule/core/platform/ios/RCTTurboModuleManager.mm

@@ -27,6 +27,7 @@
 #import <ReactCommon/TurboCxxModule.h>
 #import <ReactCommon/TurboModuleBinding.h>
 #import <ReactCommon/TurboModulePerfLogger.h>
+#import <ReactCommon/TurboModuleUtils.h>
 
 using namespace facebook;
 using namespace facebook::react;

scripts/react_native_pods.rb

@@ -65,7 +65,7 @@ def use_react_native! (options={})
     pod 'React-Core/DevSupport', :path => "#{prefix}/"
   end
 
-  pod 'React-bridging', :path => "#{prefix}/ReactCommon/react/bridging"
+  pod 'React-bridging', :path => "#{prefix}/ReactCommon"
   pod 'React-cxxreact', :path => "#{prefix}/ReactCommon/cxxreact"
   pod 'React-jsi', :path => "#{prefix}/ReactCommon/jsi"
   pod 'React-jsiexecutor', :path => "#{prefix}/ReactCommon/jsiexecutor"