AzureMonitor: Fix Log Analytics portal links (#65482)

* Fix and update Log Analytics portal links

- Build portal URL in backend
- Correctly set multiple resource value
- Move AddConfigLinks util function
- Add necessary types
- Remove unused functions

* Fix lint issue

* Remove unused cache variable

pkg/tsdb/azuremonitor/loganalytics/utils.go

@@ -0,0 +1,36 @@
+package loganalytics
+
+import (
+	"fmt"
+
+	"github.com/grafana/grafana-azure-sdk-go/azsettings"
+	"github.com/grafana/grafana-plugin-sdk-go/data"
+)
+
+func AddConfigLinks(frame data.Frame, dl string) data.Frame {
+	for i := range frame.Fields {
+		if frame.Fields[i].Config == nil {
+			frame.Fields[i].Config = &data.FieldConfig{}
+		}
+		deepLink := data.DataLink{
+			Title:       "View in Azure Portal",
+			TargetBlank: true,
+			URL:         dl,
+		}
+		frame.Fields[i].Config.Links = append(frame.Fields[i].Config.Links, deepLink)
+	}
+	return frame
+}
+
+func GetAzurePortalUrl(azureCloud string) (string, error) {
+	switch azureCloud {
+	case azsettings.AzurePublic:
+		return "https://portal.azure.com", nil
+	case azsettings.AzureChina:
+		return "https://portal.azure.cn", nil
+	case azsettings.AzureUSGovernment:
+		return "https://portal.azure.us", nil
+	default:
+		return "", fmt.Errorf("the cloud is not supported")
+	}
+}