Increase thresholds in scenarios for variables
Increase TTFB to reduce noise based on latest results https://10k.testbed.gitlab.net/-/grafana/d/J0ysCtCWz/gpt-test-results?orgId=1&var-test_name=scenario_api_list_group_variables&var-test_name=scenario_api_list_project_variables&var-test_name=scenario_api_new_project_variables&var-test_name=scenario_api_new_group_variables