Cloud SQL Admin: Workload Replay Stop Method Refactored

The sqladmin.v1 API has significantly refactored the workloadCaptures.stopReplay method. Previously, this method required a workloadId as a path parameter, and its request body schema StopWorkloadReplayContext included replayInstance and workloadId properties. All of these have now been removed. This means the method's URI path template has changed from .../workloadCaptures/{workloadId}:stopReplay to .../workloadCaptures:stopReplay. Developers must update their calls to workloadCaptures.stopReplay to remove the workloadId from the path and adjust any request body construction that relied on replayInstance or workloadId within StopWorkloadReplayContext. This is a breaking change that impacts how workload replay stopping is initiated.