Add additional AI metrics
Related to https://gitlab.com/gitlab-org/gitlab/-/issues/419629
$ ./test-dashboard.sh stage-groups/ai_framework.dashboard.jsonnet
Installed https://dashboards.gitlab.net/dashboard/snapshot/whK9d2s8zJiZ8d6NXBTMhh4KUCgQvNGa - stage-groups: AI Framework: Group dashboard
Add additional AI metrics
- adds additional metrics related to chat and AI requests