Auto-sync draft PRs (#1890)

Currently draft PRs require `/ok to test`. There is a new requirement that this also needs a hash. Since RMM CI is very fast and there aren't very many developers, I would appreciate having lower friction for working on draft PRs and getting CI feedback before opening for review.

Authors:
  - Bradley Dice (https://github.com/bdice)

Approvers:
  - Kyle Edwards (https://github.com/KyleFromNVIDIA)

URL: #1890

Author: bdice

.github/copy-pr-bot.yaml

@@ -2,4 +2,4 @@
 # https://docs.gha-runners.nvidia.com/apps/copy-pr-bot/
 
 enabled: true
-auto_sync_draft: false
+auto_sync_draft: true