[clang] [clang][bytecode] Use tailcalls via `[[clang::musttail]]` (PR #173756)

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llvmonpower wrote:

Hello!
This is causing issues on the PPC buildbots, as well: https://lab.llvm.org/buildbot/#/builders/145/builds/13354

I know you posted a revert for the PR recently, but figured I'd inform that they need to be disabled for PPC, as well. 

https://github.com/llvm/llvm-project/pull/173756