[compiler-rt] [llvm] [AArch64] Implement INIT/ADJUST_TRAMPOLINE (PR #70267)

[Carlos Seo via llvm-commits]

ceseo wrote:

@kiranchandramohan do you want this in for LLVM 19, or should we leave it for LLVM 20?

https://github.com/llvm/llvm-project/pull/70267