[llvm] [mlir] [LLVM][MLIR] Move LSP server support library from MLIR into LLVM (PR #157885)

[Jan Ječmen via llvm-commits]

JanJecmen wrote:

Not quite sure. I was looking lower at the last chunk which lists the FileCheck stderr, and that one says `Input was: ...` but the first 100 lines of it are omitted. It lists also a `Content-Length` line which is not present in the top chunk.

https://github.com/llvm/llvm-project/pull/157885