chore(deps): update registry.gitlab.com/gitlab-com/gl-infra/common-ci-tasks-images/helm docker tag to v3.20.1

Merge branch 'renovate/registry.gitlab.com-gitlab-com-gl-infra-common-ci-tasks-images-helm-3.x' into 'main'

chore(deps): update registry.gitlab.com/gitlab-com/gl-infra/common-ci-tasks-images/helm docker tag to v3.20.1

See merge request !589

Add deploy/publish stages for release-platform projects.
Add commented-out Runway inputs to .gitlab-ci.yml.jinja.
Add migration script to detect and migrate existing Runway includes.

AI-assisted: GitLab Duo Agentic Chat (Claude Opus 4.6)

feat: integrate Runway deployment into release-platform component

See merge request !588