Add missing Synthetics and Metrics Scope descriptions (#1530)

Co-authored-by: ci.datadog-api-spec <packages@datadoghq.com>

Author: api-clients-generation-pipeline[bot]

.apigentools-info

@@ -4,13 +4,13 @@
     "spec_versions": {
         "v1": {
             "apigentools_version": "1.6.4",
-            "regenerated": "2023-06-20 12:59:31.914866",
-            "spec_repo_commit": "717925f9"
+            "regenerated": "2023-06-21 18:47:24.706777",
+            "spec_repo_commit": "0f485c44"
         },
         "v2": {
             "apigentools_version": "1.6.4",
-            "regenerated": "2023-06-20 12:59:31.927023",
-            "spec_repo_commit": "717925f9"
+            "regenerated": "2023-06-21 18:47:24.722522",
+            "spec_repo_commit": "0f485c44"
         }
     }
 }

.generator/schemas/v2/openapi.yaml

@@ -15621,6 +15621,7 @@ components:
             incident_read: View incidents in Datadog.
             incident_settings_write: Configure Incidents settings.
             incident_write: Create, view, and manage incidents in Datadog.
+            metric_tags_write: Create and edit tag configurations for custom metrics.
             metrics_read: View custom metrics.
             monitors_downtime: Set downtimes to suppress alerts from any monitor in
               an organization. The ability to write monitors is not required to set
@@ -15637,6 +15638,8 @@ components:
             security_monitoring_signals_read: View Security Signals.
             synthetics_default_settings_read: View the default settings for Synthetic
               Monitoring.
+            synthetics_default_settings_write: Create and edit default settings for
+              Synthetic Monitoring.
             teams_manage: Manage Teams. Create, delete, rename, and edit the metadata
               of all Teams. To control Team membership across all Teams, use the User
               Access Manage permission.