[lld] [ELF] Add --compress-section to compress matched non-SHF_ALLOC sections (PR #84855)

[Fangrui Song via llvm-commits]

MaskRay wrote:

This patch has been reviewed last July and we have decided to have at least the non-SHF_ALLOC form.
I somehow tried to figure out the SHF_ALLOC issue and did not land it. I'll land this specific non-SHF_ALLOC form shortly.

https://github.com/llvm/llvm-project/pull/84855