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.

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

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