fw_dut_info: change output to match dut.sh

Output is now inline with what is expected by the template (the template
here being the firmware bug template referred to in
https://chromium.googlesource.com/chromiumos/docs/+/master/firmware_test_manual.md).

The SSD related handlers and VPD handlers are also aligned to the dut.sh
behaviors in this change.

BUG=b:150699151
TEST=built, ran against a DUT with NVMe and one with MMC, inspected
output (for missing fields).

Change-Id: I5652f150126fc952b8dd5e5ad24e6285f540a18b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crostestutils/+/2088797
Tested-by: Kevin Shelton <kmshelton@chromium.org>
Commit-Queue: Kevin Shelton <kmshelton@chromium.org>
Reviewed-by: Greg Edelston <gredelston@google.com>