sdk/resourcemanager: tracking a LRO status of Completed as Succeeded

sdk/client/resourcemanager/poller_lro.go

@@ -155,6 +155,8 @@ func (p *longRunningOperationPoller) Poll(ctx context.Context) (result *pollers.
 			// whilst the standard set above should be sufficient, some APIs differ from the spec and should be documented below:
 			// Dashboard@2022-08-01 returns `Accepted` rather than `InProgress` during creation
 			"Accepted": pollers.PollingStatusInProgress,
+			// CostManagement@2021-10-01 returns `Completed` rather than `Succeeded`: https://github.com/Azure/azure-sdk-for-go/issues/20342
+			"Completed": pollers.PollingStatusSucceeded,
 			// SignalR@2022-02-01 returns `Running` rather than `InProgress` during creation
 			"Running": pollers.PollingStatusInProgress,
 		}