Add initial monitoring SLO resource (#3363) (#1953)

* initial SLO resource

* a space

* indent

* whitespace

* add comment

* sidebar

* rename test fun

* add validation, required

* fmt

* fix format code

* change rolling period to int days

* doc

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

Author: modular-magician

.changelog/3363.txt

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

google-beta/provider.go

@@ -598,9 +598,9 @@ func Provider() terraform.ResourceProvider {
 	return provider
 }
 
-// Generated resources: 143
+// Generated resources: 144
 // Generated IAM resources: 54
-// Total generated resources: 197
+// Total generated resources: 198
 func ResourceMap() map[string]*schema.Resource {
 	resourceMap, _ := ResourceMapWithErrors()
 	return resourceMap
@@ -766,6 +766,7 @@ func ResourceMapWithErrors() (map[string]*schema.Resource, error) {
 			"google_monitoring_group":                                      resourceMonitoringGroup(),
 			"google_monitoring_notification_channel":                       resourceMonitoringNotificationChannel(),
 			"google_monitoring_custom_service":                             resourceMonitoringService(),
+			"google_monitoring_slo":                                        resourceMonitoringSlo(),
 			"google_monitoring_uptime_check_config":                        resourceMonitoringUptimeCheckConfig(),
 			"google_os_login_ssh_public_key":                               resourceOSLoginSSHPublicKey(),
 			"google_pubsub_topic":                                          resourcePubsubTopic(),