Cache .git to improve checkout time

[f-meloni]

Summary

Caching the .git to speed up the checkout.

https://circleci.com/docs/2.0/caching/#source-caching

This doesn't work on the machines that use a docker executor

Changelog

[Infrastructure] - Cache .git to improve checkout time

Test Plan

Run the change on Circle

[analysis-bot]

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

Base commit: 56e9aa3
Branch: main

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	7,780,769	+0
android	hermes	armeabi-v7a	7,184,414	+0
android	hermes	x86	8,090,677	+0
android	hermes	x86_64	8,069,773	+0
android	jsc	arm64-v8a	9,653,405	+0
android	jsc	armeabi-v7a	8,425,816	+0
android	jsc	x86	9,603,911	+0
android	jsc	x86_64	10,200,191	+0

Base commit: 56e9aa3
Branch: main

[facebook-github-bot]

@f-meloni has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[facebook-github-bot]

@f-meloni has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[react-native-bot]

This pull request was successfully merged by @f-meloni in 7b703eb.

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