Fix saving files as `*.sql` on macOS Sequoia (#20195)

Closes #16969

Release Notes:

- Fixed a bug in macOS Sequoia where you can't save a new file as
`*.sql`, it would rename to `.sql.s`. As a side effect you can no longer
save a new file as `*sql.s`. We hope to remove this workaround when the
operating system fixes its bug; in the meantime you can either set
`"use_system_path_prompts": false` in your settings file to skip the
macOS dialogues, or create new files by right clicking in the project
panel.