Add Terraform support for the Security Gateway resource (#12695) (#9017)

[upstream:03a313d13c5d31f8e8fc71cb32d06157bc260f78]

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

.changelog/12695.txt

@@ -0,0 +1,3 @@
+```release-note:new-resource
+`google_beyondcorp_security_gateway`
+```

google-beta/provider/provider_mmv1_resources.go

@@ -513,9 +513,9 @@ var handwrittenIAMDatasources = map[string]*schema.Resource{
 }
 
 // Resources
-// Generated resources: 577
+// Generated resources: 578
 // Generated IAM resources: 294
-// Total generated resources: 871
+// Total generated resources: 872
 var generatedResources = map[string]*schema.Resource{
 	"google_folder_access_approval_settings":                                     accessapproval.ResourceAccessApprovalFolderSettings(),
 	"google_organization_access_approval_settings":                               accessapproval.ResourceAccessApprovalOrganizationSettings(),
@@ -602,6 +602,7 @@ var generatedResources = map[string]*schema.Resource{
 	"google_beyondcorp_app_connection":                                           beyondcorp.ResourceBeyondcorpAppConnection(),
 	"google_beyondcorp_app_connector":                                            beyondcorp.ResourceBeyondcorpAppConnector(),
 	"google_beyondcorp_app_gateway":                                              beyondcorp.ResourceBeyondcorpAppGateway(),
+	"google_beyondcorp_security_gateway":                                         beyondcorp.ResourceBeyondcorpSecurityGateway(),
 	"google_biglake_catalog":                                                     biglake.ResourceBiglakeCatalog(),
 	"google_biglake_database":                                                    biglake.ResourceBiglakeDatabase(),
 	"google_biglake_table":                                                       biglake.ResourceBiglakeTable(),