fixup: tweak eslint config for Storybook

[mcous]

Overview

Slight tweak to the linting config of the storybook PR to allow linting of stories even though we haven't quite figured out how to integrate the stories into full typechecking.

Changelog

• Unignore **/*.stories.tsx in eslint config
  • This has the important side-effect of also unignoring them for prettier
• Create a tsconfg-eslint-json config, without project references, to typescript-eslint can do its thing
  • Following this recommendation

  If your existing configuration does not include all of the files you would like to lint, you can create a separate tsconfig.eslint.json

• Override a few eslint rules that don't make sense in stories, e.g. import/no-default-export

Review requests

Does this make sense and look ok?

Risk assessment

N/A, to be merged into edge via #7549

[b-cooper]

💥