Removed use of String::Util perl module from TAP test cases, and now using
Text::Trim module instead, as that is more stable. Also removed the
Data::Str2Num perl module as it was not needed any more.
As we are using compute_query_id on pg14 onwards for PGSM and it
causes the server installcheck-world to fail (same behaviour with PGSS).
To test installcheck-world on pg14 onwards we need to disable compute_query_id
and run server installcheck-world. But for PGSM regression we will still have
compute_query_id on.