[lld] [llvm] [lld] Revise IDE folder structure (PR #89747)

[Michael Kruse via llvm-commits]

Meinersbur wrote:

> llvm/ files are included. Are they intentional?

This wasn't intentionally. There was a huge jumble when Github closed this PR when the parent #89741 was merged (instead of retargeting to main as it does usually). I removed those changes.

Thanks for the review.

https://github.com/llvm/llvm-project/pull/89747