tools/factory: Improve test summary report card

Updates the summary to print the names of all tests run with their
statuses and information about the device and operator. Also improves
sample formatting.

Change-Id: Ife364e8d4816506776007cab23635861d65a1695
Reviewed-on: https://pigweed-internal-review.git.corp.google.com/c/pigweed/showcase/rp2/+/73390
Commit-Queue: Alexei Frolov <frolv@google.com>
Reviewed-by: Keir Mierle <keir@google.com>