feat(graphql): Miscellaneous query additions (datahub-project#9855)

Author: asikowitz

datahub-web-react/src/graphql/dataPlatform.graphql

@@ -3,3 +3,11 @@ query getDataPlatform($urn: String!) {
         ...platformFields
     }
 }
+
+query getDataPlatforms($urns: [String!]!) {
+    entities(urns: $urns) {
+        ... on DataPlatform {
+            ...platformFields
+        }
+    }
+}

datahub-web-react/src/graphql/post.graphql

@@ -7,6 +7,9 @@ query listPosts($input: ListPostsInput!) {
             urn
             type
             postType
+            lastModified {
+                time
+            }
             content {
                 contentType
                 title

datahub-web-react/src/graphql/preview.graphql

@@ -295,6 +295,16 @@ fragment entityPreview on Entity {
             ...deprecationFields
         }
     }
+    ... on MLFeature {
+        name
+        description
+        ownership {
+            ...ownershipFields
+        }
+        deprecation {
+            ...deprecationFields
+        }
+    }
     ... on MLModelGroup {
         name
         origin