[llvm] [clang] [CMake][PGO] Build Sema.cpp to generate profdata for PGO builds (PR #77347)

[Tom Stellard via cfe-commits]

tstellar wrote:

I split the new configuration option out into a separate PR: #78879, because it seems useful regardless of what the default is.  We can continue to discuss the best default on this PR.

https://github.com/llvm/llvm-project/pull/77347