[clang] [AArch64] add some more tests for FMV (PR #91490)

[Tomas Matheson via cfe-commits]

tmatheson-arm wrote:

The autogenerated checks for `clang/test/CodeGen/aarch64-fmv-dependencies.c` did not actually pass, due to changes in function ordering, so I have manually written the check lines, which makes the intent clearer anyway.

Some things look odd to me:
- The "aes", "dgh", "fp", "ls64", "ls64_v", "memtag", "rpres", "sha1", "simd", "ssbs" functions all have the same set of `target_features`: `"+fp-armv8,+neon,+outline-atomics,+v8a"`
- `bf16` and `ebf16` seem to be equivalent, and `+ebf16` doesn't get added to the `target-features`
- `memtag2` and `memtag3` both have the same `target-features` (which has only `+mte`)
- `+fp-armv8,+neon` are present in all cases. I'm guessing this is due to the base architecture enabling them. However, disabling them with `-march=+nofp` adds `-fp-armv8,-neon` to all `target-features`, even where the `target_version` should re-enable it.

Are any of these cause for concern?

https://github.com/llvm/llvm-project/pull/91490