Merge branch 'dmishunov-fix-snippet-editing' into 'master'

Fixing the snippet editing form

Closes #220785

See merge request gitlab-org/gitlab!36709

app/assets/javascripts/snippets/fragments/snippetBase.fragment.graphql

@@ -26,6 +26,21 @@ fragment SnippetBase on Snippet {
       ...BlobViewer
     }
   }
+  blob {
+    binary
+    name
+    path
+    rawPath
+    size
+    externalStorage
+    renderedAsText
+    simpleViewer {
+      ...BlobViewer
+    }
+    richViewer {
+      ...BlobViewer
+    }
+  }
   userPermissions {
     adminSnippet
     updateSnippet