[Genesis] update polling `/ai-chat` endpoint over the course of 90s#434

jj22ee merged 1 commit intoaws-observability:mainaws-observability/aws-application-signals-test-framework:mainfrom

jj22ee:fix-genai-test-generate-metricsjj22ee/aws-application-signals-test-framework:fix-genai-test-generate-metricsCopy head branch name to clipboard