[llvm] [LLVM][IR][Sanitizers] Add sanitize_numerical_stability attribute (PR #95051)

[Vitaly Buka via llvm-commits]

vitalybuka wrote:

> You can remove `Test plan: ninja check-all` from the commit message.

and add into .git/config
```
[spr]
	requireTestPlan = false
```

https://github.com/llvm/llvm-project/pull/95051