[gold] Skia Infra instance: add Leandro's service account to list of allowed users.
[gold] Skia Infra instance: add Leandro's service account to list of allowed users.

Change-Id: Iabb1705b71375e4a93a06614d8cfcdbbc67a84fe
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/269144
Reviewed-by: Leandro Lovisolo <f558143c2568be8d55575d13f30a1fc5cb8009d5@google.com>
Commit-Queue: Leandro Lovisolo <f558143c2568be8d55575d13f30a1fc5cb8009d5@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