Use conventional-commits-parser for parsing commits for validation, this is being done
in anticipation of relying on this parser for release note creation. Unifying how commits
are parsed will provide the most consistency in our tooling.
PR Close#41286
When attempting to actually rely on `parseCommitMessagesForRange`, it became apparent
that the function really belongs in the parse file, rather than utils.
PR Close#39747
Joey Perrott