[lld] Revert "[lld][AArch64][ELF][PAC] Support `.relr.auth.dyn` section" (PR #94843)

[Daniil Kovalev via llvm-commits]

kovdan01 wrote:

The revert causes some failures on buildbots - see https://lab.llvm.org/buildbot/#/builders/247/builds/19606. All these failures are false-positives with the following error:

> ld.lld: error: cannot open output file /home/kovdan01/Work/armpac/llvm-project/.build/rel-with-deb-info/tools/lld/test/ELF/Output/aarch64-reloc-pauth.s.tmp: Is a directory 

Before the original PR, `%t` was used as an output file name, after - as a temporary directory name. After revert we again use `%t` as an output file name, but, if the temporary directory with the same name is left in build folder, the issue occurs. A clean build or manual removal of the temp directory resolves the issue.

https://github.com/llvm/llvm-project/pull/94843