Fix missing realization type in Simulation label

[andreas-el]

Issue
Resolves #9053

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 'pytest tests/ert/unit_tests -n logical -m "not integration_test"')

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: Create Backport PR to latest release

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.70%. Comparing base (6153918) to head (bcc731e).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9054      +/-   ##
==========================================
+ Coverage   90.67%   90.70%   +0.03%     
==========================================
  Files         349      349              
  Lines       21776    21776              
==========================================
+ Hits        19745    19753       +8     
+ Misses       2031     2023       -8     

Flag	Coverage Δ
cli-tests	38.99% <0.00%> (+0.01%)	⬆️
gui-tests	71.70% <100.00%> (+0.02%)	⬆️
performance-tests	49.24% <0.00%> (ø)
unit-tests	79.54% <0.00%> (+0.01%)	⬆️

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