Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/36210
One of the circular dependencies we have in OSS was between React-Codegen and React-Fabric.
React-Codegen generates component which has to depends on React-Fabric because they need to use the files contained in the `react/renderer/view` folder.
React-Fabric contains some components that depends on RNCore, which was generated inside the React-Codegen folder.
This change generates the RNCore components inside the `ReactCommon/react/renderer/components/rncore` folder, breaking the dependency as `rncore` folder is now contained by React-Fabric itself.
**Fun Fact:** That's how it always should have been. There was already a line in the `.gitignore` to exclude the content of `ReactCommon/react/renderer/components/rncore` folder. I guess that with some of the refactoring/previous projects on Codegen, this requirements has slipped.
## Changelog:
[iOS][Breaking] - generates RNCore components inside the ReactCommon folder and create a new pod for platform-specific ImageManager classes
Reviewed By: sammy-SC, dmytrorykun
Differential Revision: D43304641
fbshipit-source-id: ebb5033ce73dbcd03f880c3e204511fdce04b816