Storm: Fix linting and helm dependency update

[ljubon]

What type of PR is this?

This is an improvement PR

What this PR does / why we need it:

After merging #121 we found a problem with Storm chart during lint and installing process. More info in the comment

Resolves: https://github.com/G-Research/gr-oss/issues/610

The scope of this PR is:

• Re-used already given solution from Fix issues with dependencies when using external Zookeeper #118 to resolve chart dependencies.
  The user is added as co-author of this commit ⭐
• Adding required helm repo to the workflow
• Changing default Storm official docker image in values.yaml from 2.4.0 -> 2.4.0-temurin
  as the old version is not available any more on https://hub.docker.com/_/storm/tags
• Fixing linting errors
• Bumping the version of chart 1.2.0 -> 1.2.1 which will be released and published upon merging this PR on upstream repo

Acceptance criteria / Notes for the reviewer:

• Checks are green
• Comments are resolved
• No issues during lint
• No issues during installing the chart

[pavlovic-ivan]

LGTM. Thanks @ljubon! 🚀