Add a gitHub action to check that Json schemas and other generated files are up-to-date

[davidfestal]

On each Pull Requests, add a validation to check that the json schemas, and other generated files, have correctly been generated and committed back to the repository.

If not we should not allow merging the PR

[elsony]

Community call discussion 3/28:

1. Not part of devfile 2.2 release

[github-actions]

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