Update code checks to use clang-format-14 AND document which version of LLVM (and its tools) we are using for developing and formatting

[NikitaNikolaenko]

The old clang-format-13 formats code like this:

[[nodiscard]] auto WaitForOneOfSignals(int(&&signums)[N]) {

clang-format-14 formats the same code like this:

[[nodiscard]] auto WaitForOneOfSignals(int (&&signums)[N]) {

This causes our code-check-style action to fail.

[CodingCanuck]

Where are we using clang-format-14?

If/when we switch clang-format versions, we should do so everywhere (which I think just means also updating our GitHub codespaces for the respect repo: https://github.com/reboot-dev/respect/blob/411a39d3ce38f4222e5f3ce88896331dce6cd8fc/.devcontainer/Dockerfile#L59 )

[NikitaNikolaenko]

Where are we using clang-format-14?

I locally use clang-format-14 since I'm using LLVM 14.