Relocate the rendered manifest via a before-stage migration so existing
projects' local customizations are carried to the new path and merged
with template changes (new path intentionally NOT in _skip_if_exists).

chore(deps): update common-ci-tasks to v4.11

See merge request !723

chore(deps): update dependency gitlab-com/gl-infra/platform/runway/fairway to v1.26.0

See merge request !724

chore(deps): update dependency gitlab-org/caproni to v2.46.1

See merge request !725

feat: move release-platform manifest from .fairway/manifest.yaml to .runway/fairway.yml

See merge request !716