Enable `assumeImmutableResults` in security_configuration provider

This commit solves https://gitlab.com/gitlab-org/gitlab/-/issues/331281
It enables `assumeImmutableResults` in the security_configuration provider.
And fixes a syntax error introduced through
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/67667

app/assets/javascripts/vue_shared/security_configuration/provider.js

@@ -5,6 +5,5 @@ import createDefaultClient from '~/lib/graphql';
 Vue.use(VueApollo);
 
 export default new VueApollo({
-  assumeImmutableResults: true,
-  defaultClient: createDefaultClient(),
+  defaultClient: createDefaultClient({}, { assumeImmutableResults: true }),
 });