gomod: bump pgtype version for hstore fixes
Created by: Strum355
Bumps jackc/pgtype to v1.11 due to fixes to hstore
deserializing required for https://github.com/sourcegraph/sourcegraph/pull/36306/. Some tests had to be updated due to the change in handling of time.Time
's time.Location
property as per https://github.com/jackc/pgtype/pull/94/
Test plan
Relevant tests that were affected have been updated, existing tests should catch remaining issues. Dry-run will also be performed (LINK HERE)