Promote metric settings in compute region autoscaler to GA (#10045)

Author: pksunkara

mmv1/products/compute/RegionAutoscaler.yaml

@@ -140,7 +140,6 @@ properties:
           Defines operating mode for this policy.
       - !ruby/object:Api::Type::NestedObject
         name: 'scaleDownControl'
-        min_version: beta
         description: |
           Defines scale down controls to reduce the risk of response latency
           and outages due to abrupt scale-in events
@@ -265,7 +264,6 @@ properties:
               required: true
             - !ruby/object:Api::Type::Double
               name: 'singleInstanceAssignment'
-              min_version: beta
               description: |
                 If scaling is based on a per-group metric value that represents the
                 total amount of work to be done or resource usage, set this value to
@@ -341,7 +339,6 @@ properties:
                 (if you are using gce_instance resource type). If multiple
                 TimeSeries are returned upon the query execution, the autoscaler
                 will sum their respective values to obtain its scaling value.
-              min_version: beta
       - !ruby/object:Api::Type::NestedObject
         name: 'loadBalancingUtilization'
         description: |

mmv1/third_party/terraform/services/compute/resource_compute_region_autoscaler_test.go.erb

@@ -217,14 +217,12 @@ resource "google_compute_region_autoscaler" "foobar" {
       target = 0.5
       predictive_method = "OPTIMIZE_AVAILABILITY"
     }
-<% unless version == 'ga' -%>
     scale_down_control {
       max_scaled_down_replicas {
         percent = 80
       }
       time_window_sec = 300
     }
-<% end -%>
   }
 }
 `, autoscalerName)
@@ -269,14 +267,12 @@ resource "google_compute_region_autoscaler" "foobar" {
     cpu_utilization {
       target = 0.5
     }
-<% unless version == 'ga' -%>
     scale_down_control {
       max_scaled_down_replicas {
         percent = 80
       }
       time_window_sec = 300
     }
-<% end -%>
     scaling_schedules {
       name = "every-weekday-morning"
       description = "Increase to 2 every weekday at 7AM for 6 hours."