Bug 29744: (QA follow-up) Call psgi_env in OO style

Bug 29744: (QA follow-up) Call psgi_env in OO style

Result of git grep -l -E "::psgi_env" | xargs sed -i -e's/::psgi_env/->psgi_env/g'

Also resolving this warn from Auth.t:
Use of uninitialized value $ENV{"SCRIPT_NAME"} in pattern match (m//) at /usr/share/koha/Koha/AuthUtils.pm line 211.

Note that the following warn is resolved on report 30588 (underway).
Use of uninitialized value $return in numeric gt (>) at /usr/share/koha/C4/Auth.pm line 1154.

Test plan:
Run t/db_dependent/Auth.t
Hit some opac, intranet pages. API call.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>