[clang] [llvm] [AArch64][clang] Use tablegen rather than hard-coded feature dependencies (NFCI) (PR #190959)

[Jonathan Thackray via cfe-commits]

jthackray wrote:

> Should this be marked as NFC ? Or is change in behaviour expected ?

Yes, this is NFC (intended). I've only added a few new tests. Some of the names are different, e.g. `HasMatMul` vs `HasI8MM`, or `HasMatmulFP64` vs `HasF64MM` but this change should be NFC.

https://github.com/llvm/llvm-project/pull/190959