tr: reject unknown character classes during sequence parsing #11398

Performance Gate Passed

✅ 298 untouched benchmarks
⏩ 48 skipped benchmarks¹

_{Comparing can1357:tr-reject-unknown-character-classes-during-sequence-parsing (5c044b5) with main (ef8e45c)}

48 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩