[FEA] Enable support for more regular expressions with \A and \Z

[NVnavkumar]

Is your feature request related to a problem? Please describe.
Currently, there are certain escape sequences in regular expressions that are unsupported in the plugin because the behavior is either inconsistent with Spark or crashes the underlying libcudf.

Describe the solution you'd like
\A*, \A+ and \Z can be transpiled to equivalents:

• \A in repetitions can be transpiled to single \A or \A? depending on whether there is a * or + or {0,} or {1,}, and etc.
• \Z can be transpiled to [\n\r]*$, and in repetition we could at least support + by essentially dropping it

[NVnavkumar]

Partial duplicate of #4532 to enable \Z.