extsvc: Redact urls field in Go modules connection config
Created by: tsenart
Context
Follow up PR to #32999 to redact URLs in external service configs. This commit introduces support for redaction of passwords in each value of the urls
field of the Go modules connection.
We can later re-use the new urlField for other url fields across different external service configs.
Part of #32658 (closed)
Test plan
Unit and manual testing.