Configure E2E test to run on comments (#46572)

Summary:
This change configure the Test All job to enable the E2E tests with an input parameter.
Then it adds another workflow that is triggered on PRs when someone posts the "/test-e2e" comment.

## Changelog:
[Internal] - Let users run E2E tests on a specific PR comment

Pull Request resolved: https://github.com/facebook/react-native/pull/46572

Test Plan: This kind of things can only be tested once the PR lands, as workflows that are triggered by comments runs only from the main branch.

Reviewed By: cortinico

Differential Revision: D63021786

Pulled By: cipolleschi

fbshipit-source-id: 95b271f6de658ca208c773429fedef2a36417752