[llvm] Reapply [llvm-ar] Use COFF archive format for COFF targets. #82642 with fixes for no symbol table handling. (PR #82898)

[Jake Egan via llvm-commits]

jakeegan wrote:

Hi, this test is failing on AIX, could you take a look?
https://lab.llvm.org/buildbot/#/builders/214/builds/11580/steps/6/logs/FAIL__LLVM__coff-symtab_test

https://github.com/llvm/llvm-project/pull/82898