[RN][CI] Fix Nightlies for Android

[cipolleschi]

Summary:

While migrating from CCI to GHA, we mistakenly set the ORG_GRADLE_PROJECT_reactNativeArchitectures wrongly. The result was that the nightly was building only 1 architecture for android instead of all of them.

This change fixes that, but asking GHA to build all the architectures when running nightlies

Changelog:

[Internal] - Build all the architectures for android when running nightlies

Test Plan:

Run a nightly from the branch and see it working

[facebook-github-bot]

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

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	20,248,885	-5
android	hermes	armeabi-v7a	n/a	--
android	hermes	x86	n/a	--
android	hermes	x86_64	n/a	--
android	jsc	arm64-v8a	23,454,650	-6
android	jsc	armeabi-v7a	n/a	--
android	jsc	x86	n/a	--
android	jsc	x86_64	n/a	--

Base commit: 6937c70
Branch: main

[cipolleschi]

Can confirm that Nightly works now:

[facebook-github-bot]

@cipolleschi merged this pull request in 9fa0764.

[github-actions]

This pull request was successfully merged by @cipolleschi in 9fa0764.

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