Remove translation between JobState and JobStatus

[jonathan-eq]

This commit removes the legacy class for jobstatus, and instead replaces its use with JobState.

Issue Resolves #8342

Approach ✂️

(Screenshot of new behavior in GUI if applicable)

• [x] PR title captures the intent of the changes, and is fitting for release notes.
• [x] Added appropriate release note label
• [x] Commit history is consistent and clean, in line with the contribution guidelines.
• [x] Make sure tests pass locally (after every commit!)

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

Attention: Patch coverage is 93.87755% with 3 lines in your changes missing coverage. Please review.

Project coverage is 90.65%. Comparing base (17e01cc) to head (d6e0a2a). Report is 42 commits behind head on main.

Files	Patch %	Lines
src/ert/simulator/batch_simulator_context.py	88.88%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #8389 +/- ## ========================================== - Coverage 90.88% 90.65% -0.23% ========================================== Files 347 344 -3 Lines 21131 20989 -142 ========================================== - Hits 19204 19028 -176 - Misses 1927 1961 +34 ``` | [Flag](https://app.codecov.io/gh/equinor/ert/pull/8389/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=equinor) | Coverage Δ | | |---|---|---| | [gui-tests](https://app.codecov.io/gh/equinor/ert/pull/8389/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=equinor) | `75.92% <83.67%> (-0.25%)` | :arrow_down: | | [integration-tests](https://app.codecov.io/gh/equinor/ert/pull/8389/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=equinor) | `53.93% <89.79%> (-0.33%)` | :arrow_down: | | [unit-tests](https://app.codecov.io/gh/equinor/ert/pull/8389/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=equinor) | `68.67% <93.87%> (-0.28%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=equinor#carryforward-flags-in-the-pull-request-comment) to find out more.

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