Fix hermes-engine Podfile.lock checksum inconsistency across developers

[rolandnagy]

Summary:

Fixed an issue where developers with identical development environments get different checksums for hermes-engine in Podfile.lock, causing unnecessary git conflicts.

The root cause was that hermes-engine.podspec used require.resolve() to get the absolute path to hermes-compiler, which included usernames. This caused the generated hermes-engine.podspec.json to differ across developers, resulting in different checksums.

See Issue: #54891

Changelog:

[IOS] [FIXED] - Fix hermes-engine Podfile.lock checksum inconsistency across developers

Test Plan:

• Created a test project with local React Native changes
• Ran pod install and verified hermes-engine.podspec.json contains
  ${PODS_ROOT}/../../node_modules/hermes-compiler path
• Verified app builds and runs successfully with Hermes enabled
• Confirmed hermesc binary resolves correctly at build time

[meta-codesync]

@philIip has imported this pull request. If you are a Meta employee, you can view this in D90932424.

[cortinico]

Review automatically exported from Phabricator review in Meta.