[BUG] Improve detection of regexp patterns that cuDF cannot compile

[andygrove]

Is your feature request related to a problem? Please describe.
The AST-based regex fuzz tests currently does not test choices (|) because it can generate patterns that cuDF does not support and that we do not detect as unsupported. I would like us to improve the logic to catch these cases so that we can enable choices in the fuzz tests to improve coverage.

Here is an example of an error that occurs when choices are enabled:

cuDF failed to compile pattern: \A| 

Describe the solution you'd like
Improve logic for detecting uncompilable patterns and enable choice in fuzz tests.

Describe alternatives you've considered
None

Additional context
None