[Codegen] extract emitPromise from parsers modules to shared parsers-primitives

[AntoineDoubovetzky]

Summary

This PR is a task from #34872:

Extract the content of the case 'Promise' (Flow, TypeScript) into a single emitPromise function in the parsers-primitives.js file. Use the new function in the parsers.

Note that this PR should be merged after #34933

Changelog

[Internal] [Changed] - Extract contents of the case 'Promise' into a single emitPromise function inside parsers-primitives

Test Plan

I tested using jest and flow commands.

[analysis-bot]

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

Base commit: f8996f1
Branch: main

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	7,768,182	-30
android	hermes	armeabi-v7a	7,169,296	-39
android	hermes	x86	8,081,411	-42
android	hermes	x86_64	8,053,024	-35
android	jsc	arm64-v8a	9,629,382	-26
android	jsc	armeabi-v7a	8,393,808	-24
android	jsc	x86	9,578,801	-13
android	jsc	x86_64	10,171,894	-20

Base commit: 2f58e52
Branch: main

[rshest]

This PR is a bit confusing, tbh... the title says one thing, but the code does at least two other things?.. :)

[AntoineDoubovetzky]

@rshest This PR depends on #34933 that extracts assertGenericTypeAnnotationHasExactlyOneTypeParameter and that's why #34933 should be merged first and then we should rebase this PR.
About the title there was indeed a copy/paste error, I corrected.

[rshest]

@AntoineDoubovetzky Ah, this makes sense, thanks for correcting the title!

[facebook-github-bot]

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

[AntoineDoubovetzky]

I rebased after adding a commit to #34933

[react-native-bot]

This pull request was successfully merged by @AntoineDoubovetzky in 966f3cd.

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