[clang] [Clang][Sema]:Fix musttail attribute on a function with not_tail_called attribute has no warning/error (PR #134465)

[via cfe-commits]

MillePlateaux wrote:

Since adding this modification, I passed the local test, and there was no response when using command``clang -cc1 -fsyntax-only -verify -Wno-error`` , but I don’t know why there was an error after submitting.

https://github.com/llvm/llvm-project/pull/134465