Regression enhancements

[MarkWolters]

This PR addresses the following issues with the run-bench GitHub workflow for regression testing:

• Links benchmark_config input parameter to regression test arguments: This parameter was intended for use as a filter on the datasets to test with (e.g. provide a regex to run the regression tests on a subset of the default) but was not previously linked to the test execution so that all default datasets were tested regardless of the value of this argument
• Fixes issue where output files were not created when branch name contains an illegal character. Illegal characters will now be replaced with underscores in the filename.
• Fix for issue where report generation was not occurring in the final step because search for csv files was using an incorrect naming pattern.
• Fix for diagnostic logging interfering with expected output of tests

[github-actions]

If you haven't seen them already, please review CONTRIBUTIONS.md

Summary of Changes

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Explain here why this PR is being submitted, it's purpose and impact for users.

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Checklist before you submit for review

• Did you include performance data for changes which may be performance impacting?
• Did you include useful docs for any user-facing changes or features?
• Did you include useful javadocs for developer oriented changes, explaining new concepts or key changes?
• Did you trigger and review regression testing results against the base branch via Run Bench Main?
• Did you adhere to the code formatting guidelines (TBD)
• Did you group your changes for easy review, providing meaningful descriptions for each commit?
• Did you ensure that all files contain the correct copyright header?

If you did not complete any of these, then please explain below

[jshook]

LGTM

[marianotepper]

Looks good.