GitLab

Make fuchsia-ssh-port flag optional.
Pass on ssh config file directly to gpu tests

Bug: 1133039
Change-Id: Iefdf83760965d140463d14d7c083d3d2276c6411
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2436519
Commit-Queue: Chong Gu <chonggu@google.com>
Reviewed-by: Brian Sheedy <bsheedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#813152}