Fix OSS CI (#52042)

Summary:
The OSS CI for iOS is broken because of a couple of commit that landed:
- Commit 05a61e816108774499bcf837d48d2c0c681d9559 : dynamic frameworks are broken
- Commit abc8fe1c92e5f8014d2c8b84f39daaed1fd6660e : pod donwload is broken

This change fixes both of them

## Changelog:
[Internal] - Fix OSS CI

Pull Request resolved: https://github.com/facebook/react-native/pull/52042

Test Plan:
Tested locally by building RNTester with Dynamic frameworks

```
USE_FRAMEWORKS=dynamic bundle exec pod install
```

Reviewed By: rshest, lenaic, GijsWeterings

Differential Revision: D76730331

Pulled By: cipolleschi

fbshipit-source-id: 71cca1f50763d24773dedcd8267130df261b01dc