Fix Cocoapods for Xcode 14.3.0 (facebook#36759)

Summary:
Pull Request resolved: facebook#36759

On Thursday the 30th, Apple Released Xcode 14.3.0.
This Version of Xcode enforce some version checks for which React-Codegen, which supported iOS 11 as minimum supported version, could not be build anymore.

This change ensue that React-Codegen is always aligned to the min version supported by React Native.
Plus, it moves CircleCI's Xcode to 14.3.0, to keep this problem in Check.

While working on this, I figured that, with the monorepo, Ruby tests stopped working because they were in the wrong folder: I moved them in the right one.

## Changelog:
[iOS][Fixed] - Make React Native build with Xcode 14.3.0 and fix tests

Reviewed By: blakef

Differential Revision: D44605617

fbshipit-source-id: 3ec1f5b36858ef07d9f713d74eb411a1edcccd45

Author: cipolleschi

.circleci/config.yml

@@ -46,7 +46,7 @@ references:
   #        Dependency Anchors
   # -------------------------
   dependency_versions:
-    xcode_version: &xcode_version "14.2.0"
+    xcode_version: &xcode_version "14.3.0"
     nodelts_image: &nodelts_image "cimg/node:18.12.1"
     nodeprevlts_image: &nodeprevlts_image "cimg/node:16.18.1"
 
@@ -620,7 +620,7 @@ jobs:
       - run:
           name: Run Ruby Tests
           command: |
-            cd scripts
+            cd packages/react-native/scripts
             sh run_ruby_tests.sh
       - run_yarn
       - *attach_hermes_workspace

packages/react-native/scripts/cocoapods/__tests__/codegen_utils-test.rb

@@ -15,6 +15,14 @@
 require_relative "./test_utils/CodegenScriptPhaseExtractorMock.rb"
 require_relative "./test_utils/FileUtilsMock.rb"
 
+# mocking the min_ios_version_supported function
+# as it is not possible to require the original react_native_pod
+# without incurring in circular deps
+# TODO: move `min_ios_version_supported` to utils.rb
+def min_ios_version_supported
+    return '12.4'
+end
+
 class CodegenUtilsTests < Test::Unit::TestCase
     :base_path
 
@@ -527,7 +535,7 @@ def get_podspec_no_fabric_no_script
           'source' => { :git => '' },
           'header_mappings_dir' => './',
           'platforms' => {
-            'ios' => '11.0',
+            'ios' => '12.4',
           },
           'source_files' => "**/*.{h,mm,cpp}",
           'pod_target_xcconfig' => {

packages/react-native/scripts/cocoapods/codegen_utils.rb

@@ -111,7 +111,7 @@ def get_react_codegen_spec(package_json_file, folly_version: '2021.07.22.00', fa
           'source' => { :git => '' },
           'header_mappings_dir' => './',
           'platforms' => {
-            'ios' => '11.0',
+            'ios' => min_ios_version_supported,
           },
           'source_files' => "**/*.{h,mm,cpp}",
           'pod_target_xcconfig' => {