Add REGEXP_REPLACE function (enabled in BigQuery library)

Add support for REGEXP_REPLACE function from BigQuery.

REGEXP_REPLACE(value, regexp, replacement)
Returns a STRING where all substrings of value that match regular expression regexp are replaced with replacement.

backslashed-escaped digits (\1 to \9) can be used within the replacement argument to insert text matching the corresponding parenthesized group in the regexp pattern.

Example (added one space between \ \ to override md formatting):

SELECT REGEXP_REPLACE("abc'", "b(.)", "X\ \1") as result;