Revert "Fix build failure on iOS with pnpm and use_frameworks! (#38158)" (#39177)

Summary:
This partially reverts commit 58adc5e4b9.

Using an absolute path in a podspec is wrong, and causes checksum issues when installs are ran on different systems.

Example:

`pod install --deployment --clean-install` breaks on non-matching checksums on CI because the absolute path is not the same in that environment.

```
Adding spec repo `trunk` with CDN `https://cdn.cocoapods.org/`
Verifying no changes
[!] There were changes to the lockfile in deployment mode:
SPEC CHECKSUMS:
  React-debug:
    New Lockfile: 419922cde6c58cd5b9d43e4a09805146a7dd13a8
    Old Lockfile: 1ce329843d8f9a9cbe0cdd9de264b20e89586734
  React-NativeModulesApple:
    New Lockfile: a683b0c999e76b7d15ad9d5eaf8b6308e710a93e
    Old Lockfile: f82356d67a137295d098a98a03be5ee35871b5a5
  React-runtimescheduler:
    New Lockfile: 79f8dff11acbe36aaeece63553680d7a8272af96
    Old Lockfile: 16c5282d43a0df50d7c68ebf0218aeeb642a7086
  React-utils:
    New Lockfile: 4fabb3cba786651e35bc41e610b0698fa24cecff
    Old Lockfile: e7e9118d0e85b107bb06d1a5f72ec5db6bddb911
  ReactCommon:
    New Lockfile: af30fb021799e18c85a8e30ce799e15607e82212
    Old Lockfile: f04f86f33c22e05dbf875789ea522ee486dace78
```

And even tho the change fixed an issue with pnpm, the issue it introduces with cocoapods I think is a bigger one.

## Changelog:

[INTERNAL] - Revert commit that makes podfile unstable

Pull Request resolved: https://github.com/facebook/react-native/pull/39177

Test Plan: Tested locally that the hashes are stable

Reviewed By: NickGerleman

Differential Revision: D48773887

Pulled By: cipolleschi

fbshipit-source-id: 96bcdbadc17a24fa9a8669f569d004bee6a03521

packages/react-native/ReactCommon/React-Fabric.podspec

@@ -37,7 +37,7 @@ Pod::Spec.new do |s|
                             "DEFINES_MODULE" => "YES" }
 
   if ENV['USE_FRAMEWORKS']
-    s.header_mappings_dir     = File.absolute_path('./')
+    s.header_mappings_dir     = './'
     s.module_name             = 'React_Fabric'
   end
 

packages/react-native/ReactCommon/ReactCommon.podspec

@@ -37,7 +37,7 @@ Pod::Spec.new do |s|
                                "CLANG_CXX_LANGUAGE_STANDARD" => "c++17",
                                "GCC_WARN_PEDANTIC" => "YES" }
   if ENV['USE_FRAMEWORKS']
-    s.header_mappings_dir     = File.absolute_path("./")
+    s.header_mappings_dir     = './'
   end
 
   # TODO (T48588859): Restructure this target to align with dir structure: "react/nativemodule/..."

packages/react-native/ReactCommon/react/debug/React-debug.podspec

@@ -32,6 +32,6 @@ Pod::Spec.new do |s|
 
   if ENV['USE_FRAMEWORKS']
     s.module_name            = "React_debug"
-    s.header_mappings_dir  = File.absolute_path("../..")
+    s.header_mappings_dir  = "../.."
   end
 end

packages/react-native/ReactCommon/react/nativemodule/core/platform/ios/React-NativeModulesApple.podspec

@@ -37,7 +37,7 @@ Pod::Spec.new do |s|
                                 "CLANG_CXX_LANGUAGE_STANDARD" => "c++17",
                                 "GCC_WARN_PEDANTIC" => "YES" }
     if ENV['USE_FRAMEWORKS']
-        s.header_mappings_dir     = File.absolute_path('./')
+        s.header_mappings_dir     = './'
     end
 
     s.source_files = "ReactCommon/**/*.{mm,cpp,h}"

packages/react-native/ReactCommon/react/nativemodule/samples/ReactCommon-Samples.podspec

@@ -37,7 +37,7 @@ Pod::Spec.new do |s|
                                "CLANG_CXX_LANGUAGE_STANDARD" => "c++17",
                                "GCC_WARN_PEDANTIC" => "YES" }
   if ENV['USE_FRAMEWORKS']
-    s.header_mappings_dir     = File.absolute_path('./')
+    s.header_mappings_dir     = './'
   end
 
 

packages/react-native/ReactCommon/react/renderer/graphics/React-graphics.podspec

@@ -45,7 +45,7 @@ Pod::Spec.new do |s|
 
   if ENV['USE_FRAMEWORKS']
     s.module_name            = "React_graphics"
-    s.header_mappings_dir  =  File.absolute_path("../../..")
+    s.header_mappings_dir  = "../../.."
     header_search_paths = header_search_paths + ["\"$(PODS_TARGET_SRCROOT)/platform/ios\""]
   end
 

packages/react-native/ReactCommon/react/renderer/imagemanager/platform/ios/React-ImageManager.podspec

@@ -42,7 +42,7 @@ Pod::Spec.new do |s|
 
   if ENV['USE_FRAMEWORKS']
     s.module_name            = "React_ImageManager"
-    s.header_mappings_dir  = File.absolute_path("./")
+    s.header_mappings_dir  = "./"
     header_search_paths = header_search_paths + [
       "\"${PODS_CONFIGURATION_BUILD_DIR}/React-Fabric/React_Fabric.framework/Headers\"",
       "\"$(PODS_ROOT)/DoubleConversion\"",

packages/react-native/ReactCommon/react/renderer/runtimescheduler/React-runtimescheduler.podspec

@@ -48,7 +48,7 @@ Pod::Spec.new do |s|
 
   if ENV['USE_FRAMEWORKS']
     s.module_name            = "React_runtimescheduler"
-    s.header_mappings_dir  = File.absolute_path("../../..")
+    s.header_mappings_dir  = "../../.."
   end
 
   s.dependency "React-jsi"

packages/react-native/ReactCommon/react/utils/React-utils.podspec

@@ -48,7 +48,7 @@ Pod::Spec.new do |s|
 
   if ENV['USE_FRAMEWORKS']
     s.module_name            = "React_utils"
-    s.header_mappings_dir  = File.absolute_path("../..")
+    s.header_mappings_dir  = "../.."
   end
 
   s.dependency "RCT-Folly", folly_version