ci: Use `typos` to check commit messages

Commit messages in the CMake repo may have Git hashes that can trigger
false positives in the `typos` checker.

Revert commit ddebf4653d (ci: Do not check commit messages with 'typos'
due to false positives, 2025-02-07).  Instead, copy the top-level config
file to a temporary location, add a configuration option to mark
10-hex-digit identifiers as always valid, and pass it to `typos` at the
commit checking phase.