upgrade to eslint v9

[RayBB]

Closes #10805

TODO:

• Get pre-commit working. No idea why npm command works but not pre-commit
  • Partially Fixed by installing @eslint/js which is used by the new config
• Get the tests directory working, will need some special config.

Technical

It seems pre-commit and eslint and node modules don't work well together. So it's in a bash script now.
See:

• Bug: eslint v9 doesn't work in pre-commit eslint/eslint#19776
• npm install not running in CI pre-commit-ci/issues#255

Testing

Screenshot

Stakeholders

[cdrini]

Chatted with @RayBB , this has become tricky! Having different flows for how eslint runs in CI vs locally would be a bit frustrating to maintain; hopefully one of the other repos has an idea/solution! Otherwise I think sticking with the older eslint for now might be good enough. I'm sure they'll sort it out eventually, at which point we can update 😁 In the mean time, it might be worth look at oxc; that's a newer player in this space, not sure if it can do everything we're using eslint for, but might be worth a look!