Select the set of indicators for available variables

[vindelico]

Pull Request Checklist:

• [ ] This PR addresses an already opened issue (for bug fixes / features)
  • This PR fixes #xyz
• [ ] (If applicable) Documentation has been added / updated (for bug fixes / features).
• [x] (If applicable) Tests have been added.
• [x] This PR does not seem to break the templates.
• [x] HISTORY.rst has been updated (with summary of main changes).
  • [x] Link to pull request (:pull:number) has been added.

What kind of change does this PR introduce?

Adds the function xscen.indicators.select_inds_for_avail_vars to filter the indicators that can be calculated with the variables available in a xarray.Dataset.

Does this PR introduce a breaking change?

No.

Other information: