[results feed] Choose which results to filter with radio buttons
[results feed] Choose which results to filter with radio buttons

Only three choices are given:
  Show all changes
  Show latest failures
  Show latest unapproved failures

Change-Id: Ifae64742b6d7c2182c38fd2ca9de29c8722fad38
Reviewed-on: https://dart-review.googlesource.com/c/dart_ci/+/130421
Reviewed-by: Alexander Thomas <29642742b6693024c89de8232f2e2542cf7eedf7@google.com>

dart-lang/dart_ci,dart-lang/dart_ci,dart-lang/dart_ci,dart-lang/dart_ci