Enable `assumeImmutableResults` in view blob project files

This commit solves https://gitlab.com/gitlab-org/gitlab/-/issues/338436
It enables `assumeImmutableResults` in the view blob on project files.

app/assets/javascripts/pages/projects/blob/show/index.js

@@ -14,7 +14,7 @@ import '~/sourcegraph/load';
 Vue.use(VueApollo);
 
 const apolloProvider = new VueApollo({
-  defaultClient: createDefaultClient(),
+  defaultClient: createDefaultClient({}, { assumeImmutableResults: true }),
 });
 
 const viewBlobEl = document.querySelector('#js-view-blob-app');