[clang] Fix __builtin_vectorelements tests with REQUIRES (PR #69582)

[Timm Baeder via cfe-commits]

tbaederr wrote:

> _a)_ Is this the correct way to do this

You don't need review for this I think. I can't review this patch. If it takes a while you should rather revert your original patch.


> _b)_ can I trigger the full tests before merging to main to avoid a second set of failed buildbots?

Not that I know of.

If you think this is the right way forward, you can merge this as-is, I don't know if this is correct. If this patch still doesn't fix the failing build bots, you should probably revert the original patch for the time being.

https://github.com/llvm/llvm-project/pull/69582