[clang] [Clang][ARM][AArch64] Add branch protection attributes to the defaults. (PR #83277)

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DanielKristofKiss wrote:

Thanks.
I'm planning to land once all related patches are ready to land and in this order:
 #82819 #83277 #83153  #83154 

https://github.com/llvm/llvm-project/pull/83277