[compiler-rt] [win/asan] Populate test for function GetInstructionSize. (PR #118204)

[via llvm-commits]

bernhardu wrote:

> Still lgtm. Should I push the "Squash and merge" button, or is it available for you now?

No, I don't have this button, just this message:
![grafik](https://github.com/user-attachments/assets/75d9584d-4195-42ed-a228-0a20c5f21f7e)

Would be great if you could commit it, I am still unsure with the review process.

https://github.com/llvm/llvm-project/pull/118204