Revert "[infra] Upgrade gsutil to a new version (#31065)"

This reverts commit 787194e738c0abebbe8213f5b7b6149a53202814.

Reason for revert: Broke windows bots.

Original change's description:
> [infra] Upgrade gsutil to a new version (#31065)
> 
> Change-Id: Ie78c6295a5b11cc12adc07a65f716638bcc71495
> Reviewed-on: https://dart-review.googlesource.com/c/79208
> Reviewed-by: Martin Kustermann <kustermann@google.com>
> Commit-Queue: Martin Kustermann <kustermann@google.com>

TBR=kustermann@google.com,athom@google.com

Change-Id: I75c0a2731f80e969fdcd06a6ca2ed72a0407dfbc
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dart-review.googlesource.com/c/79214
Reviewed-by: Alexander Thomas <athom@google.com>
Commit-Queue: Alexander Thomas <athom@google.com>