[PLAT-11640] Fix React Native CLI for RN 0.73

[joshedney]

Goal

Ensure that the react native cli works with RN 0.73

Changeset

Added additional checks around finding MainApplication as in RN 0.73 it is no longer MainApplication.java but MainApplication. I've also added MainApplication.kt as this file was mentioned in the bug ticket but I'm unable to see that file when generating a new RN 0.73 project.

Testing

Covered by CI

[github-actions]

@bugsnag/browser bundle size diff

	Minified	Minfied + Gzipped
Before	43.70 kB	13.40 kB
After	43.70 kB	13.40 kB
±	No change	No change

code coverage diff

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Generated by 🚫 dangerJS against fb30861

[gingerbenw]

Looks good to me! Just suggested a simplification for the Insert.ts script.