Use EnableDcrManagedSources command line arg in AMA ME service (#2170)

* Use EnableDcrManagedSources

* Revert change in fallback service file

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Co-authored-by: niamh.gowran2@mail.dcu.ie <niamhgowran@microsoft.com>

Author: ngowran

AzureMonitorAgent/services/metrics-extension-cmv2.service

@@ -8,7 +8,7 @@ Environment="OTLP_GRPC_PORT=4317"
 Environment="OTLP_GRPC_PROM_HOST=127.0.0.1"
 Environment="OTLP_GRPC_PROM_PORT=4316"
 EnvironmentFile=-/etc/metrics-extension.d/options.conf
-ExecStart=%ME_BIN% -TokenSource AMCS -ManagedIdentity %ME_MANAGED_IDENTITY% -DataDirectory %ME_DATA_DIRECTORY% -Input influxdb_local,otlp_grpc,otlp_grpc_prom -InfluxDbSocketPath %ME_INFLUX_SOCKET_FILE_PATH% -LogLevel Info -Logger Console -OperationEnvironment AMA-Linux/AMA_VERSION -ConfigOverrides "{\"otlp\":{\"endpoints\":[\"${OTLP_GRPC_PROM_HOST}:${OTLP_GRPC_PROM_PORT}\"]}}"
+ExecStart=%ME_BIN% -EnableDcrManagedSources -ManagedIdentity %ME_MANAGED_IDENTITY% -DataDirectory %ME_DATA_DIRECTORY% -Input influxdb_local -InfluxDbSocketPath %ME_INFLUX_SOCKET_FILE_PATH% -LogLevel Info -Logger Console -OperationEnvironment AMA-Linux/AMA_VERSION -ConfigOverrides "{\"otlp\":{\"endpoints\":[\"${OTLP_GRPC_PROM_HOST}:${OTLP_GRPC_PROM_PORT}\"]}}"
 ExecReload=/bin/kill -HUP $MAINPID
 KillMode=control-group
 User=azuremetricsext