Initialize ert config with plugins when starting webviz ert

[larsevj]

Issue
Resolves #9251

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

[xjules]

Hm, seems like we need to update dependencies:

    _import_error_message = (
        "dask.distributed is not installed.\n\n"
        "Please either conda or pip install distributed:\n\n"
        "  conda install dask distributed             # either conda install\n"
        '  python -m pip install "dask[distributed]" --upgrade    # or pip install'
    )
    
    try:
        from distributed import *
    except ImportError as e:
        if e.msg == "No module named 'distributed'":
>           raise ImportError(_import_error_message) from e
E           ImportError: dask.distributed is not installed.
E           
E           Please either conda or pip install distributed:
E           
E             conda install dask distributed             # either conda install
E             python -m pip install "dask[distributed]" --upgrade    # or pip install

[xjules]

You have some errors and btw:

tests/ert/unit_tests/test_tracking.py::test_run_information_present_as_env_var_in_fm_context[ensemble_smoother]
tests/ert/unit_tests/test_tracking.py::test_run_information_present_as_env_var_in_fm_context[ensemble_smoother]
  /Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/asyncio/subprocess.py:224: RuntimeWarning: Using fork() can cause Polars to deadlock in the child process.
  In addition, using fork() with Python in general is a recipe for mysterious
  deadlocks and crashes.

[xjules]

Nice one @larsevj! 🚀