Auto merge of #9169 - Alexendoo:message-convention-regex, r=flip1995

Use `LazyLock` for `lint_message_convention` regexes

They were being recompiled for `Message::new` call, for me this shaves 7s off the time it takes to run the test. Also removes a redundant exception from the list and joins the various `message...` exceptions into one

changelog: none