WebLayer: Pin new CIPD packages for WebLayer skew tests

This CL will pin new CIPD packages containing milestone
binaries for WebLayer skew tests. See crbug.com/1041619
and crbug.com/1099017 for more information.

R=rubber-stamper@appspot.gserviceaccount.com

Cq-Include-Trybots: luci.chromium.try: android-weblayer-10-x86-rel-tests,android-weblayer-marshmallow-x86-rel-tests,android-weblayer-pie-x86-rel-tests
Bug: None
Change-Id: I90ea090f67f391c6217c79a7717a1e9418df5545
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3770177
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: chrome-weblayer-builder <chrome-weblayer-builder@chops-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1025628}