Support `regexp_match` for `LargeUtf8`

[chebbyChefNEQ]

#899 enabled regexp_match, but if we call with regexp_match(col, pattern) where col is of type LargeUtf8 the code panics.

a few notes:

1. regexp_match on LargeUtf8 is probably highly inefficient, as the datasize practically doubles in memory (compare to Utf8)
2. I'm not sure how to dispatch to arrow_cast function in datafusion expressions.