[llvm] [OpenMPOpt][PGO] Set entry count on merged parallel wrapper (PR #221654)

[Alok Kumar Sharma via llvm-commits]

alokkrsharma wrote:

Thanks @mtrofin and @ro-i for the reviews and approvals. I've incorporated the requested changes, pushed the updates, and confirmed the tests are passing. Merging now.

https://github.com/llvm/llvm-project/pull/221654