[llvm] [SamplePGO] Add a cutoff for number of profile matching anchors (PR #95542)

[Lei Wang via llvm-commits]

https://github.com/wlei-llvm approved this pull request.

> Sounds good. For the time being, the patch looks ok (to workaround OOM issues experience)?

Sounds good to unblock the OOM.

https://github.com/llvm/llvm-project/pull/95542