Solve py312 warning on pkgutil.get_loader

[berland]

Using importlib instead

Issue

tests/unit_tests/shared/share/test_shell.py::test_shell_script_jobs_names
  /Users/HAVB/venv/3.12-arm64/lib/python3.12/site-packages/ert/config/ert_config.py:71: DeprecationWarning: 'pkgutil.get_loader' is deprecated and slated for removal in Python 3.14; use importlib.util.find_spec() instead
    ert_shared_loader = cast("FileLoader", pkgutil.get_loader("ert.shared"))

Approach
Use importlib.util.find_spec

• 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 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

All modified and coverable lines are covered by tests ✅

Project coverage is 85.22%. Comparing base (b4eedfc) to head (ec9caf0).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7597      +/-   ##
==========================================
+ Coverage   84.51%   85.22%   +0.71%     
==========================================
  Files         388      388              
  Lines       23352    23355       +3     
  Branches      892      892              
==========================================
+ Hits        19735    19904     +169     
+ Misses       3510     3344     -166     
  Partials      107      107              

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[jonathan-eq]

Instead of passing TYPE_CHECKING, can we just remove it?

[berland]

ay yes, should have. Sorry I clicked the merge button too soon.

[jonathan-eq]

LGTM! 🚢