[lld] [LLD] Implement --enable-non-contiguous-regions (PR #90007)

[Peter Smith via llvm-commits]

https://github.com/smithp35 commented:

Thanks very much for working on this. I've not had a chance to work through the tests yet.

So far most comments are cosmetic so I think this is looking good from my size. I expect MaskRay will want to look at the code in detail.

https://github.com/llvm/llvm-project/pull/90007