add CloudWatch Usage Metrics (#22179)

https://docs.amazonaws.cn/en_us/AmazonCloudWatch/latest/monitoring/CloudWatch-Usage-Metrics.html

pkg/tsdb/cloudwatch/metric_find_query.go

@@ -115,6 +115,7 @@ func init() {
 		"AWS/TransitGateway":    {"BytesIn", "BytesOut", "PacketDropCountBlackhole", "PacketDropCountNoRoute", "PacketsIn", "PacketsOut"},
 		"AWS/Translate":         {"CharacterCount", "ResponseTime", "ServerErrorCount", "SuccessfulRequestCount", "ThrottledCount", "UserErrorCount"},
 		"AWS/TrustedAdvisor":    {"GreenChecks", "RedChecks", "RedResources", "ServiceLimitUsage", "YellowChecks", "YellowResources"},
+		"AWS/Usage":             {"CallCount"},
 		"AWS/VPN":               {"TunnelDataIn", "TunnelDataOut", "TunnelState"},
 		"AWS/WorkSpaces":        {"Available", "ConnectionAttempt", "ConnectionFailure", "ConnectionSuccess", "InSessionLatency", "Maintenance", "SessionDisconnect", "SessionLaunchTime", "Stopped", "Unhealthy", "UserConnected"},
 		"ECS/ContainerInsights": {"ContainerInstanceCount", "CpuUtilized", "CpuReserved", "DeploymentCount", "DesiredTaskCount", "MemoryUtilized", "MemoryReserved", "NetworkRxBytes", "NetworkTxBytes", "PendingTaskCount", "RunningTaskCount", "ServiceCount", "StorageReadBytes", "StorageWriteBytes", "TaskCount", "TaskSetCount", "instance_cpu_limit", "instance_cpu_reserved_capacity", "instance_cpu_usage_total", "instance_cpu_utilization", "instance_filesystem_utilization", "instance_memory_limit", "instance_memory_reserved_capacity", "instance_memory_utliization", "instance_memory_working_set", "instance_network_total_bytes", "instance_number_of_running_tasks"},
@@ -198,6 +199,7 @@ func init() {
 		"AWS/TransitGateway":    {"TransitGateway"},
 		"AWS/Translate":         {"LanguagePair", "Operation"},
 		"AWS/TrustedAdvisor":    {},
+		"AWS/Usage":             {"Class", "Resource", "Service", "Type"},
 		"AWS/VPN":               {"TunnelIpAddress", "VpnId"},
 		"AWS/WorkSpaces":        {"DirectoryId", "WorkspaceId"},
 		"ECS/ContainerInsights": {"ClusterName", "ServiceName", "TaskDefinitionFamily", "EC2InstanceId", "ContainerInstanceId"},