WIP: rebasing distance esmda - not for merge

[xjules]

Issue
Resolves #my_issue

Approach
Short description of the approach

(Screenshot of new behavior in GUI if applicable)

• PR title captures the intent of the changes, and is fitting for release notes.
• Added appropriate release note label
• Commit history is consistent and clean, in line with the contribution guidelines.
• Make sure unit tests pass locally after every commit (git rebase -i main --exec 'just rapid-tests')

When applicable

• When there are user facing changes: Updated documentation
• New behavior or changes to existing untested code: Ensured that unit tests are added (See Ground Rules).
• Large PR: Prepare changes in small commits for more convenient review
• Bug fix: Add regression test for the bug
• Bug fix: Add backport label to latest release (format: 'backport release-branch-name')

[codecov-commenter]

Codecov Report

❌ Patch coverage is 85.18519% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.65%. Comparing base (e9cbe0b) to head (ac882d9).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ert/analysis/_es_update.py	84.90%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #12837      +/-   ##
==========================================
- Coverage   90.70%   90.65%   -0.06%     
==========================================
  Files         436      437       +1     
  Lines       30350    30413      +63     
==========================================
+ Hits        27529    27570      +41     
- Misses       2821     2843      +22     

Flag	Coverage Δ
cli-tests	37.27% <85.18%> (+0.19%)	⬆️
gui-tests	68.30% <35.18%> (-0.03%)	⬇️
performance-and-unit-tests	77.04% <35.18%> (-0.10%)	⬇️
test	37.35% <11.11%> (-0.05%)	⬇️

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[codspeed-hq]

Merging this PR will not alter performance

✅ 34 untouched benchmarks

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_{Comparing xjules:desmda_entry_rebased (ac882d9) with main (0cf1c26)}

[xjules]

closing this one