[16.0][OU-FIX] base_address_extended: regexp fix

[MiquelRForgeFlow]

Supersedes #5009.

See:

In v13: https://www.postgresql.org/docs/13/functions-matching.html

\S 	[^[:space:]]
Within bracket expressions, \d, \s, and \w lose their outer brackets, and \D, \S, and \W are illegal. (So, for example, [a-c\d] is equivalent to [a-c[:digit:]]. Also, [a-c\D], which is equivalent to [a-c^[:digit:]], is illegal.)

In v15: https://www.postgresql.org/docs/15/functions-matching.html

\S 	matches any non-whitespace character, like [^[:space:]]
The class-shorthand escapes also work within bracket expressions, although the definitions shown above are not quite syntactically valid in that context. For example, [a-c\d] is equivalent to [a-c[:digit:]].