feat/add multiple workers behind feature gate

exporter/prometheusremotewriteexporter/config.go

@@ -35,7 +35,7 @@ type Config struct {
 	// maximum size in bytes of time series batch sent to remote storage
 	MaxBatchSizeBytes int `mapstructure:"max_batch_size_bytes"`
 
-	// maximum ammount of parallel requests to do when handling large batch request
+	// maximum amount of parallel requests to do when handling large batch request
 	MaxBatchRequestParallelism int `mapstructure:"max_batch_request_parallelism"`
 
 	// ResourceToTelemetrySettings is the option for converting resource attributes to telemetry attributes.