Link CI job URL and relate rollout issues

This MR links the CI job URL (if present) and relates existing rollout issues to the report issue to increase visibility.

It also adds a new mode to test creating issues via CREATE_ISSUE=test. This mode uses https://gitlab.com/gitlab-org/quality/engineering-productivity/triage-ops-playground/ by default and only creates a single report issue.

Example issue: https://gitlab.com/gitlab-org/quality/engineering-productivity/triage-ops-playground/-/issues/67

CI job URL	Related rollout issues

How test locally

CREATE_ISSUE=test GITLAB_TOKEN bundle exec bin/feature-flag-alert

CI_JOB_URL=https://gitlab.com/gitlab-org/quality/toolbox/-/jobs/6294852535 CREATE_ISSUE=test GITLAB_TOKEN=$GITLAB_API_PRIVATE_TOKEN bin/feature-flag-alert