merge test_probabilistic_metrics into TestAllDistrMetrics, fixes#398

[JahnaviDhanaSri]

Reference Issues/PRs

#398

What does this implement/fix? Explain your changes.

merged test_probabilistic_metrics into TestAllDistrMetrics

Does your contribution introduce a new dependency? If yes, which one?

No

What should a reviewer concentrate their feedback on?

Did you add any tests for the change?

Any other comments?

PR checklist

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• The PR title starts with either [ENH], [MNT], [DOC], or [BUG]. [BUG] - bugfix, [MNT] - CI, test framework, [ENH] - adding or improving code, [DOC] - writing or improving documentation or docstrings.

For new estimators

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• If the estimator relies on a soft dependency, I've set the python_dependencies tag and ensured
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