[ct] Second attempt at fixing Infra-PerCommit-PushAppsFromInfraDockerImage.
[ct] Second attempt at fixing Infra-PerCommit-PushAppsFromInfraDockerImage.

This is a followup to https://skia-review.googlesource.com/c/buildbot/+/293687.

Bug: skia:10292
Change-Id: I4be69bb5060b5723e3ace102e31d962d79870fea
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/293855
Auto-Submit: Leandro Lovisolo <f558143c2568be8d55575d13f30a1fc5cb8009d5@google.com>
Reviewed-by: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>
Commit-Queue: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot