Merge everest examples and ert test-data

[DanSava]

Issue
Resolves #8741

• 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/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 91.44%. Comparing base (5ec387a) to head (d11b2d2).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8755      +/-   ##
==========================================
+ Coverage   90.45%   91.44%   +0.99%     
==========================================
  Files         343      343              
  Lines       21251    21251              
==========================================
+ Hits        19222    19434     +212     
+ Misses       2029     1817     -212     

Flag	Coverage Δ
cli-tests	38.90% <ø> (+0.14%)	⬆️
gui-tests	72.41% <ø> (+2.17%)	⬆️
performance-tests	49.27% <ø> (-0.01%)	⬇️
unit-tests	80.11% <ø> (-0.01%)	⬇️

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[yngve-sk]

Overall LGTM, but diff makes it seem that block_storage is not there? Should be under test-data/ert/? I suppose the test_data folder under tests/everest can be merged into this in a separate PR also.