Chore(test): Reduce test timing

[MarieSacksick]

What would you like to say?

Our tests take a while with ubuntu machines - up to 9 minutes.
Let's see if we can reduce the time needed for some of them.

Here are the top 20 tests in terms of duration:

• 2.27s setup tests/unit/displays/table_report/test_estimator.py::test_error_wrong_param[params0-When kind='dist', at least one of x, y must be provided and]
• 2.22s setup tests/unit/displays/table_report/test_common.py::test_json_dump
• 2.13s call tests/unit/reports/estimator/data/test_accessor.py::test_analyze_data_source_with_y
• 2.02s setup tests/unit/displays/table_report/test_estimator.py::test_constructor
• 1.85s call src/skore/_sklearn/_cross_validation/data_accessor.py::_DataAccessor.analyze:0
• 1.79s call tests/unit/reports/estimator/test_report.py::test_cache_predictions[2-forest_binary_classification_with_test-True-10]
• 1.56s setup tests/unit/displays/table_report/test_estimator.py::test_plot_duration_data_1d
• 1.53s setup tests/unit/displays/table_report/test_common.py::test_repr
• 1.51s setup tests/unit/displays/table_report/test_estimator.py::test_error_wrong_param[params2-When kind='corr', 'x' argument must be None.]
• 1.48s call src/skore/_sklearn/_plot/data/table_report.py::TableReportDisplay:0
• 1.46s setup tests/unit/displays/table_report/test_estimator.py::test_error_wrong_param[params1-When kind='dist', at least one of x, y must be provided and]
• 1.43s setup tests/unit/displays/table_report/test_estimator.py::test_error_wrong_param[params3-'kind' options are 'dist', 'corr', got 'unknown'.]
• 1.42s call tests/unit/reports/estimator/data/test_accessor.py::test_analyze_data_source_without_y
• 1.33s call src/skore/_sklearn/_plot/data/table_report.py::TableReportDisplay._plot_matplotlib:0
• 1.30s setup tests/unit/displays/table_report/test_common.py::test_corr_plot
• 1.27s setup tests/unit/displays/table_report/test_estimator.py::test_frame[train]
• 1.14s call src/skore/_sklearn/_estimator/data_accessor.py::_DataAccessor.analyze:0
• 1.13s setup tests/unit/displays/table_report/test_estimator.py::test_frame[test]
• 1.12s setup tests/unit/displays/table_report/test_estimator.py::test_plots_2d
• 1.10s setup tests/unit/displays/table_report/test_estimator.py::test_categorical_plots_1d

(The durations displayed here are from my computer - most likely, it takes even longer in the CI).
Hint: sometimes we are using important datasets, while we may not need it.

To check before/after when optimizing a test, run pytest tests/unit/displays/table_report/test_cross_validation.py::test_html_repr --durations=1 (replace with the test adress you are interested in).