Use only get_ensemble_state to check for existing responses/parameters

[yngve-sk]

(also one step closer to statemap)

Removes duplication of looped calls to _responses_exist_for_realization, _parameters_exist_for_realization, which are now only called from within one place. Makes it easier to add a global state to them when they are invoked for all reals.

Return set of RealizationStorageState from get_ensemble_state() and show accordingly in GUI:

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 93.61702% with 3 lines in your changes missing coverage. Please review.

Project coverage is 90.60%. Comparing base (9817d75) to head (e0a9e1e).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ert/storage/local_ensemble.py	90.90%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9047      +/-   ##
==========================================
- Coverage   90.70%   90.60%   -0.10%     
==========================================
  Files         349      349              
  Lines       21776    21786      +10     
==========================================
- Hits        19751    19739      -12     
- Misses       2025     2047      +22     

Flag	Coverage Δ
cli-tests	38.82% <74.46%> (-0.17%)	⬇️
gui-tests	71.70% <93.61%> (-0.01%)	⬇️
performance-tests	49.27% <74.46%> (+0.02%)	⬆️
unit-tests	79.52% <76.59%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[oyvindeide]

Looks good, can you just do the final rebase and get it ready for merge?

[oyvindeide]

LGTM! Can you make the PR title a little more descriptive though? And remember to add a label