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/azure-log-analytics-datasource_test.go

@@ -11,7 +11,6 @@ import (
 
 	"github.com/google/go-cmp/cmp"
 	"github.com/grafana/grafana-plugin-sdk-go/backend"
-	"github.com/grafana/grafana-plugin-sdk-go/data"
 	"github.com/stretchr/testify/require"
 
 	"github.com/grafana/grafana/pkg/infra/log"
@@ -287,11 +286,3 @@ func Test_executeQueryErrorWithDifferentLogAnalyticsCreds(t *testing.T) {
 		t.Error("expecting the error to inform of bad credentials")
 	}
 }
-
-func Test_setAdditionalFrameMeta(t *testing.T) {
-	t.Run("it should not error with an empty response", func(t *testing.T) {
-		frame := data.NewFrame("test")
-		err := setAdditionalFrameMeta(frame, "", "")
-		require.NoError(t, err)
-	})
-}