Adjust AI test success rate thresholds
- AI performance tests need decreased success rate threshold while rate limiting issue is being worked around (https://gitlab.com/gitlab-org/quality/gitlab-environment-toolkit-configs/quality/-/merge_requests/136)
- Also MR enables experimental tests to run by default in perfromance pipelines
- MR adds support for
AI_ACCESS_TOKEN
that can be used if provided for AI tests
https://gitlab.com/gitlab-org/quality/quality-engineering/team-tasks/-/issues/2444#note_1837028208
Edited by Nailia Iskhakova (OOO)