[clang] [llvm] Reapply "[HWASan] remove incorrectly inferred attributes" (#106622) (PR #106624)

[David Spickett via cfe-commits]

DavidSpickett wrote:

The added test is timing out on Linaro's bots, before we had this many tests:
```
PASS: lit :: shtest-define.py (92379 of 92379)
```
And after this patch we have:
```
PASS: lit :: shtest-define.py (92379 of 92380)
```
So it's the one that's timing out.

These bots are AArch64 with SVE, unfortunately we don't have any non-SVE bots that have caught up to this. So it's possible that's the problem, also possible that it's the same issue hitting the sanitizer bot.

https://github.com/llvm/llvm-project/pull/106624