[llvm] [BasicAA] Cancel common scalable GEP offsets (PR #218195)

[Nikita Popov via llvm-commits]

nikic wrote:

Please refrain from submitting unsolicited LLM-assisted PRs without understanding of the subject matter. You've submitted multiple low quality LLM slop PRs now.

vscale gep is non-canonical, and does not need to be handled in BasicAA.

https://github.com/llvm/llvm-project/pull/218195