Fixes SSH Logic in fw_dut_info

Prior logic to run remote SSH commands didn't work. Mostly replaced with
code from corrupt_dut_cbi.go More to come, namely adding new fields to
support power EU benchmark testing.

BUG=b:326315770
TEST=manual (go run fw_dut_info.go $HOST)

Change-Id: I87a8e0f48d4bccb6a54465b55da807394e9fcbea
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crostestutils/+/5319719
Reviewed-by: Andrew Luo <aluo@chromium.org>
Tested-by: Sean Carpenter <seancarpenter@google.com>
Commit-Queue: Sean Carpenter <seancarpenter@google.com>
5 files changed