Add google_network_management_connectivity_test_run data source (#14364) (#10300)

[upstream:e14cf49d6d39b81899905c3e69afe71d87a5177b]

Signed-off-by: Modular Magician <magic-modules@google.com>

Author: modular-magician

.changelog/14364.txt

@@ -0,0 +1,3 @@
+```release-note:new-datasource
+`google_network_management_connectivity_test_run`
+```

google-beta/provider/provider_mmv1_resources.go

@@ -443,6 +443,7 @@ var handwrittenDatasources = map[string]*schema.Resource{
 	"google_vmwareengine_subnet":                                 vmwareengine.DataSourceVmwareengineSubnet(),
 	"google_vmwareengine_vcenter_credentials":                    vmwareengine.DataSourceVmwareengineVcenterCredentials(),
 	"google_compute_region_backend_service":                      compute.DataSourceGoogleComputeRegionBackendService(),
+	"google_network_management_connectivity_test_run":            networkmanagement.DataSourceGoogleNetworkManagementTestRun(),
 	// ####### END handwritten datasources ###########
 }