ddoman@ frequently moves the cipd pin of infra/tools/rdb package.

R=iannucci@chromium.org
CC=chanli@chromium.org,nodir@chromium.org,robertocn@chromium.org,tandrii@google.com,vadimsh@chromium.org

Change-Id: I26b3eae79a9b917af6197c5c42db5303a99a2c50
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2358897
Commit-Queue: Scott Lee <ddoman@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Reviewed-by: Josip Sokcevic <sokcevic@google.com>
Reviewed-by: Nodir Turakulov <nodir@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@google.com>
Reviewed-by: Andrii Shyshkalov <tandrii@google.com>