Support AI access token for passing user PAT
- MR adds support for
AI_ACCESS_TOKEN
that can be used if provided for AI tests - Increase thresholds based on test results in https://gitlab.com/gitlab-org/quality/performance/-/jobs/6661041814
Test pipeline - https://gitlab.com/gitlab-org/quality/performance/-/jobs/6661141859
Edited by Nailia Iskhakova