[autoroll] Disable GCE auth for CL uploads
[autoroll] Disable GCE auth for CL uploads

BUG=skia:5787

Change-Id: I86e9dcbbe8baa3dc87a95e6c3b78f6a52f8e5d7f
Reviewed-on: https://skia-review.googlesource.com/9159
Reviewed-by: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>
Commit-Queue: Eric Boren <0e499112533c8544f0505ea0d08394fb5ad7d8fa@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