[lld] [lld][AArch64][ELF][PAC] Support AUTH relocations and AUTH ELF marking (PR #72714)

[Kristof Beyls via llvm-commits]

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+// REQUIRES: aarch64
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kbeyls wrote:

I also find it easier when test files are small to understand things when a test fails.
OTOH, many small test files (and therefore, more RUN lines, more process invocations) results in slower overall run time of the regression tests, which does slow down all LLVM developers many times per day...

Not sure if anyone has tried to come up with a solution to both (a) have few process invocations due to RUN lines across many test files; and (b) easily be able to run small test files when a test breaks.

https://github.com/llvm/llvm-project/pull/72714