[FEA] Add support for REGEXP_SUBSTR

[andygrove]

Is your feature request related to a problem? Please describe.

Spark recently added support for REGEXP_SUBSTR in apache/spark@5adcddb

Describe the solution you'd like
Support this on GPU

Describe alternatives you've considered
None

Additional context
None

[revans2]

This is for a runtime replaceable operator. So if we support RegExpExtract, then there is nothing more we need to do. We might want to add a test for RegExpSubString just to be sure that the replacements are happening as we expect them to. But it should just work out of the box.

[anthony-chang]

Blocked until the build can compile, when #5806, #5807, and #5827 are resolved