[llvm] [AArch64] Refactor @plt, @gotpcrel, and @AUTH to use parseDataExpr (PR #134202)

[Peter Smith via llvm-commits]

https://github.com/smithp35 commented:

Overall looks good to me.

To the best that I can infer from reading the code this doesn't limit affect any data directive that is legal Today.

It is a bit of shame that we lose some of the context from the error messages, although I can't easily see how to put that back at the time the error is detected.


https://github.com/llvm/llvm-project/pull/134202