[BUG] Inconsistencies in handling of newline characters and string and line anchors

[andygrove]

Describe the bug
Although we have implemented transpiler logic to correctly rewrite patterns for cuDF for many cases, we still do not cover all cases, and adding \r and \n to the set of characters we use for fuzzing causes test failures.

This is quite a broad issue and will likely be split into multiple issues once more analysis has been done.

Steps/Code to reproduce bug
Add \r\n to the REGEXP_LIMITED_CHARS_COMMON constant in RegularExpressionTranspilerSuite and run the tests.

Expected behavior
Test should pass and we should fall back to CPU for anything that we cannot support correctly.

Environment details (please complete the following information)
N/A

Additional context
None