Add utility for filtering out skipped tests in large cross-product groups

[drisspg]

Summary

Quick clean up to tests: Before:

================================================================ 271 passed, 168 skipped, 42 warnings in 6.58s ================================================================

After:

============================================================================= 271 passed in 5.79s =============================================================================

Stack from ghstack (oldest at bottom):

• 305

• -> #303

• 301