checkout: Always save snapshot of checkout

Change-Id: I38c348cf32c3a3a248dd6b9bc4cbb6d2f8392389
Reviewed-on: https://pigweed-review.googlesource.com/c/infra/recipes/+/58407
Pigweed-Auto-Submit: Rob Mohr <mohrr@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
Reviewed-by: Anthony Fandrianto <atyfto@google.com>
95 files changed