[llvm] Port a new flag for AArch64 tablegen to Bazel rules (PR #136212)

[Rahul Joshi via llvm-commits]

jurahul wrote:

I am attempting to resurrect that change again and have incorporated the bazel build changes there: https://github.com/llvm/llvm-project/pull/136456

https://github.com/llvm/llvm-project/pull/136212