Added Prometheus monitoring CPU and memory selector. (#1387)

* Added Prometheus monitoring CPU and memory selector.

* Minor text fixes

* Fixed memory units, improvements to get return

* Updated logic to add storageClassName to get response

* Minor fixes, removed warnings

* Removed blank entry for empty storageclassname

Co-authored-by: Daniel Valdivia <18384552+dvaldivia@users.noreply.github.com>

models/tenant_monitoring_info.go

@@ -51,6 +51,12 @@ type TenantMonitoringInfo struct {
 	// labels
 	Labels []*Label `json:"labels"`
 
+	// monitoring CPU request
+	MonitoringCPURequest string `json:"monitoringCPURequest,omitempty"`
+
+	// monitoring mem request
+	MonitoringMemRequest string `json:"monitoringMemRequest,omitempty"`
+
 	// node selector
 	NodeSelector []*NodeSelector `json:"nodeSelector"`