[Bug] Kibana commit needs to update NOTICE.txt

[rw-access]

Describe the bug
Pre-commit hook not working and NOTICE.txt not updated.
I think we need to run a few yarn commands. We could also add a toggle to suppress this behavior, so we can skip this, because yarn isn't always set up.

Context: elastic/kibana#71332 (comment) from @spong

@rw-access @brokensound77 -- needed to run node scripts/notice from kibana root to regenerate the NOTICE.txt. I missed this as part of #32 as I was thinking it happened during the build, but looks like it needs to be done manually after updating any notice.ts (similar to i18n behavior). I'll defer to you for where this command fits in with your existing rules workflow, but would it be fine to add as part of the generation of this PR?

To Reproduce
See https://github.com/elastic/kibana/pull/71332/commits

Expected behavior
NOTICE.txt populated correctly

Screenshots
N/A

[brokensound77]

Can this be closed @rw-access?