[UI v2] dev: Adds tanstack query eslint rules and updates docs for variable mutations

[devinvillarosa]

1. Adds tanstack query eslint rule which ensures variables being passed into queryFn are also queryKey dependencies. Details here: https://tanstack.com/query/v5/docs/eslint/eslint-plugin-query
2. Updates docs for useMutation from previous PR [UI v2] Move delete variable mutation to variable hooks module #16141

Checklist

• This pull request references any related issue by including "closes <link to issue>"
  • If no issue exists and your change is not a small fix, please create an issue first.
• If this pull request adds new functionality, it includes unit tests that cover the changes
• If this pull request removes docs files, it includes redirect settings in mint.json.
• If this pull request adds functions or classes, it includes helpful docstrings.

Followup from #16155
Related to #15512