Add pre-commit to format chart templates

[eladkal]

Body

spawn out of #30214 (comment)

Recently we had several PRs to format the chart templates:
#30312
#29941
#29917
However we lack a mechanism to validate that new PRs are complying with the needed format
This task is about researching/finding a way to do it with pre-commit

cc @dnskr

Committer

• I acknowledge that I am a maintainer/committer of the Apache Airflow project.

[potiuk]

BTW. I could not find a good tool do to such reformatting.

This is as close as I could find for spacing https://github.com/jumanjihouse/pre-commit-hook-yamlfmt but there are more smarts in the manual refactoring.

I think a better solution than reformatting will be flagging bad usages and explaining how to fix them (unless someone would like to add a feature to ruff :) or write an equivalent.

[kunaljubce]

@potiuk @eladkal I was looking into this as it's been a while since this issue was created. I was looking specifically into helmlint, yamale and chart-testing, which also has a github action - chart-testing-action, thinking about a combination of these to make it work.

https://github.com/jumanjihouse/pre-commit-hook-yamlfmt does not seem to be actively maintained anymore.

Wanted to check if this is still a planned work on the agenda or we have a better implementation in mind before giving it a go.

[eladkal]

Wanted to check if this is still a planned work on the agenda or we have a better implementation in mind before giving it a go.

I think we are waiting for some package to have a native solution for this. Then we can just use it.
As Jarek suggested maybe a feature to ruff?