Added support for project-level custom modules (#8993) (#6315)

* Added support for project-level custom modules

Related to b/296259216

* gofmt

* Added client-side validation of display_name

* Fixed expressions in update test

* Added mutex

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

Author: modular-magician

.changelog/8993.txt

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

google-beta/provider/provider.go

@@ -1121,9 +1121,9 @@ func DatasourceMapWithErrors() (map[string]*schema.Resource, error) {
 		})
 }
 
-// Generated resources: 388
+// Generated resources: 389
 // Generated IAM resources: 240
-// Total generated resources: 628
+// Total generated resources: 629
 func ResourceMap() map[string]*schema.Resource {
 	resourceMap, _ := ResourceMapWithErrors()
 	return resourceMap
@@ -1682,6 +1682,7 @@ func ResourceMapWithErrors() (map[string]*schema.Resource, error) {
 			"google_secret_manager_secret_version":                           secretmanager.ResourceSecretManagerSecretVersion(),
 			"google_scc_mute_config":                                         securitycenter.ResourceSecurityCenterMuteConfig(),
 			"google_scc_notification_config":                                 securitycenter.ResourceSecurityCenterNotificationConfig(),
+			"google_scc_project_custom_module":                               securitycenter.ResourceSecurityCenterProjectCustomModule(),
 			"google_scc_source":                                              securitycenter.ResourceSecurityCenterSource(),
 			"google_scc_source_iam_binding":                                  tpgiamresource.ResourceIamBinding(securitycenter.SecurityCenterSourceIamSchema, securitycenter.SecurityCenterSourceIamUpdaterProducer, securitycenter.SecurityCenterSourceIdParseFunc),
 			"google_scc_source_iam_member":                                   tpgiamresource.ResourceIamMember(securitycenter.SecurityCenterSourceIamSchema, securitycenter.SecurityCenterSourceIamUpdaterProducer, securitycenter.SecurityCenterSourceIdParseFunc),