Allow both E and F states for a killed OpenPBS job

[berland]

E is a transitional state, and it will later progress to F when the queue system is done with it. In this test we pick up either E or F depending on star alignment.

Issue
Resolves #14142

Approach
🧠

• 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 screenshots are changed: Review screenshot-PR in ert-testdata,
  merge screenshot-PR in ert-testdata before merging this PR.
• 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')

[Copilot]

Pull request overview

Updates the OpenPBS scheduler unit test to tolerate the transitional E (exiting) state in addition to F (failed) when a job is killed, addressing observed CI flakiness where E may be reported before transitioning to F.

Changes:

• Relaxed the OpenPBS job-state assertion to accept either E or F for a killed job.
• Updated the assertion message to reflect the broader accepted states.

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.91%. Comparing base (8b3c3f4) to head (b136b6a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14191      +/-   ##
==========================================
- Coverage   91.92%   91.91%   -0.02%     
==========================================
  Files         482      482              
  Lines       33498    33498              
==========================================
- Hits        30794    30790       -4     
- Misses       2704     2708       +4     

Flag	Coverage Δ
cli-tests	36.47% <ø> (ø)
fuzz	44.47% <ø> (ø)
gui-tests	58.84% <ø> (-0.01%)	⬇️
performance-and-unit-tests	80.79% <ø> (-0.02%)	⬇️
test	45.99% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.
see 1 file with indirect coverage changes

[andreas-el]

⭐ ⭐ ⭐ (they are aligned)

[eqbech]

Should these comments be updated by this new information?

[berland]

Should these comments be updated by this new information?

This is what I read in order to fix this, so it is not wrong. Maybe you would like "exiting" to be more precise?

[codspeed-hq]

Merging this PR will not alter performance

✅ 36 untouched benchmarks

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_{Comparing berland:fix_openpbs_test (b136b6a) with main (8b3c3f4)}

[scout-team-app]

Successfully created backport PR for version-24.0:

• [Backport version-24.0] Allow both E and F states for a killed OpenPBS job #14196

[eqbech]

It is probably fine as is.