Add optional ./ci/code_checks.sh pre-commit

[MarcoGorelli]

xref #36722 (comment)

Is there a way to have an option in code_checks.sh that actually runs the appropriate pre-commit hook? that way we have a single source of truth, and you can actually still run them (of course have to avoid running these on the CI from the script as well)

[MarcoGorelli]

closing as by now pre-commit run --all-files has become the single source of truth