Add missing dimensionality to EverestControl

[yngve-sk]

Resolves ERT plotter not opening on everest experiment

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.63%. Comparing base (d7f0b79) to head (21b8dd8).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #12856      +/-   ##
==========================================
- Coverage   90.65%   90.63%   -0.02%     
==========================================
  Files         440      440              
  Lines       30467    30468       +1     
==========================================
- Hits        27619    27614       -5     
- Misses       2848     2854       +6     

Flag	Coverage Δ
cli-tests	37.23% <100.00%> (+<0.01%)	⬆️
gui-tests	67.86% <100.00%> (+<0.01%)	⬆️
performance-and-unit-tests	77.04% <100.00%> (-0.02%)	⬇️
test	37.34% <100.00%> (+<0.01%)	⬆️

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[codspeed-hq]

Merging this PR will not alter performance

✅ 34 untouched benchmarks

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_{Comparing yngve-sk:26.02.add-missing-dimensionality (21b8dd8) with main (d7f0b79)}