[clang] [llvm] Reapply "Use global TimerGroups for both new pass manager and old pass manager timers" (#131173) (PR #131217)

[Alan Zhao via llvm-commits]

alanzhao1 wrote:

Looks like there's still some random bolt test failures going on. I think some test expectations need to be changed.

https://github.com/llvm/llvm-project/pull/131217