Update integration test for `JSONSelect` case in gemnasium

With #361600 (closed) we can change https://gitlab.com/gitlab-org/security-products/analyzers/gemnasium/blob/71b593e/spec/image_spec.rb#L495-509 to

it_behaves_like "recorded report" do
  let(:recorded_report) { parse_expected_report(project) }
end