[lld] [PAC][lld] Do not emit warnings for `-z pac-plt` with valid PAuth core info (PR #112959)

[Daniil Kovalev via llvm-commits]

kovdan01 wrote:

Both buildbot failures present at the moment look not relates to this PR and are probably caused by some CI instabilities:

1. https://lab.llvm.org/buildbot/#/builders/4/builds/3472 - time out on running test-suite
2. https://lab.llvm.org/buildbot/#/builders/55/builds/3462 - on hwasan build, line `==153460==Unable to get registers from thread 153361` appearing in stderr cause a lit test failure.


https://github.com/llvm/llvm-project/pull/112959