[clang] [Clang][Driver][Test] Created test for unsupported driver options (PR #120900)

[Mészáros Gergely via cfe-commits]

https://github.com/Maetveis requested changes to this pull request.

Thanks, this is starting to look right. I'm sorry for the long response time, I could not justify spending work time on the review this time, and my weekends have been somewhat busy.

I'll try to get some other reviewers to look at this too, to approve of the proposed workflow when updating Options.td. I would appreciate if you could make a summary of that as a comment, but if not I'll do it later.

https://github.com/llvm/llvm-project/pull/120900