[switchboard] Create switch-pod service account.
[switchboard] Create switch-pod service account.

Bug: skia:12063
Change-Id: I7019dd3fe22c4786e9ec6cdd13f4613e90cb9376
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/418549
Reviewed-by: Kevin Lubick <7cdab2cfab351f23814786ba39716e90eed69047@google.com>
Commit-Queue: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@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