ci: improve workflow-stopper ux (#6632)
PR addresses https://github.com/paritytech/polkadot-sdk/pull/6265#issuecomment-2497506857 cc https://github.com/paritytech/ci_cd/issues/1084
PR addresses https://github.com/paritytech/polkadot-sdk/pull/6265#issuecomment-2497506857 cc https://github.com/paritytech/ci_cd/issues/1084