refactor: dryRun admin config

lib/config/admin.ts

lib/config/common.ts

lib/workers/branch/automerge.spec.ts

lib/workers/branch/automerge.ts

lib/workers/branch/commit.spec.ts

lib/workers/branch/commit.ts

lib/workers/branch/index.spec.ts

lib/workers/branch/index.ts

lib/workers/branch/reuse.ts

lib/workers/pr/index.ts

lib/workers/repository/dependency-dashboard.spec.ts

lib/workers/repository/dependency-dashboard.ts

lib/workers/repository/error-config.spec.ts

lib/workers/repository/error-config.ts

lib/workers/repository/finalise/prune.spec.ts

lib/workers/repository/finalise/prune.ts

lib/workers/repository/onboarding/branch/create.ts

lib/workers/repository/onboarding/branch/index.ts

lib/workers/repository/onboarding/branch/rebase.ts

lib/workers/repository/onboarding/pr/index.spec.ts