Add variable to increase max wait time for upgrades
Follow up from PG Upgrade attempt: gitlab-com/gl-infra/production#14403 (comment 1531027999)
Various tests failed on the first run due to increased load times from database replication. Corrective actions we can take:
- Add a flag in QA framework to increase max wait time so the test framework facilitates eventual success of the test the first time
- Set flag when we know we are running tests on environments with known performance issues