[lld] [llvm] [lld][AArch64][Build Attributes] Add support for converting AArch64 Build Attributes to GNU Properties (PR #131990)

[via llvm-commits]

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+// REQUIRES: aarch64
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sivan-shani wrote:

True, too many redundancy.
Removing unnecessary and consolidating.
A comment above asked for the  `aarch64-build-attributes-malformed.s` tests also on the lld side so leaving it for now.

https://github.com/llvm/llvm-project/pull/131990