Update MA support for OpenSearch 3.0 (#9886) (#9888)

Author: opensearch-trigger-bot[bot]

_data/migration-assistant/breaking-changes.yml

@@ -28,6 +28,10 @@ breaking_changes:
     transformation:
       title: "Type Mapping Deprecation"
       url: "/docs/latest/migration-assistant/migration-phases/planning-your-migration/handling-type-mapping-deprecation/"
+  - title: "OpenSearch 3.0: Breaking Changes"
+    url: "/docs/latest/breaking-changes/#300"
+    introducedIn: "OpenSearch 3.0"
+    comp: []
   - title: "OpenSearch Notifications Plugins"
     url: "/breaking-changes/#add-opensearch-notifications-plugins"
     introducedIn: "OpenSearch 2.19"

_data/migration-assistant/valid_migrations.yml

@@ -4,21 +4,30 @@ migration_paths:
     targets: 
       - "OpenSearch 1.3"
       - "OpenSearch 2.19"
+      - "OpenSearch 3.0"
   - source: "Elasticsearch 6.8"
     targets:
       - "OpenSearch 1.3"
       - "OpenSearch 2.19"
+      - "OpenSearch 3.0"
   - source: "Elasticsearch 7.10"
     targets:
       - "OpenSearch 1.3"
       - "OpenSearch 2.19"
+      - "OpenSearch 3.0"
   - source: "Elasticsearch 7.17"
     targets:
       - "OpenSearch 1.3"
       - "OpenSearch 2.19"
+      - "OpenSearch 3.0"
   - source: "OpenSearch 1.3"
     targets:
       - "OpenSearch 2.19"
+      - "OpenSearch 3.0"
   - source: "OpenSearch 2.19"
     targets:
       - "OpenSearch 2.19"
+      - "OpenSearch 3.0"
+  - source: "OpenSearch 3.0"
+    targets:
+      - "OpenSearch 3.0"