Move utilities out of react_native_pods - Part 2

[cipolleschi]

Summary:
This Diff moves another part of the utilities from the react_native_pods file to a specific utils.rb file.

It adds tests for these utils and improve our test mocks.

The goal is to simplify the react_native_pods.rb so it's easier to work with it.

I decided to split this diff in 2 because it was becoming quite big.

Changelog

[iOS][Changed] - Refactoring part of the react_native_pods.rb script

Differential Revision: D37006265

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D37006265

[pull-bot]

	Warnings
⚠️	🔒 package.json - Changes were made to package.json. This will require a manual import by a Facebook employee.

Generated by 🚫 dangerJS against 41534d8

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	7,782,640	+0
android	hermes	armeabi-v7a	7,172,350	+0
android	hermes	x86	8,093,283	+0
android	hermes	x86_64	8,069,317	+0
android	jsc	arm64-v8a	9,649,489	+0
android	jsc	armeabi-v7a	8,408,181	+0
android	jsc	x86	9,600,998	+0
android	jsc	x86_64	10,194,061	+0

Base commit: a0e6ffe
Branch: main

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
ios	-	universal	n/a	--

Base commit: a0e6ffe
Branch: main

[react-native-bot]

This pull request was successfully merged by @cipolleschi in 4f732ba.

^{When will my fix make it into a release? | Upcoming Releases}