[clang] [clang-tools-extra] [compiler-rt] [flang] [lld] [lldb] [llvm] [mlir] [openmp] [pstl] Finally formalise our defacto line-ending policy (PR #86318)

[via cfe-commits]

ldrumm wrote:

I've added the natvis changes and added a couple of clangd test exceptions.

For the sanity of pending reviewers, and to make rebasing this trivial I've split this into two commits: the gitattributes changes, followed by the `--renormalize` fixup.

For downstreams, I'm considering keeping this as two separate commits (rather than a fixup) so that merge conflicts can be resolved the same way. Anyone have opinions on this?

https://github.com/llvm/llvm-project/pull/86318