[femu] Use run-test-component instead of run for executing test.

Change-Id: Ib29a4d3d76303d4f8a790a9894b15953465bcab1
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/6640
Reviewed-by: Godofredo Contreras <godofredoc@google.com>
Commit-Queue: Godofredo Contreras <godofredoc@google.com>
Commit-Queue: Yuan Zhi <yuanzhi@google.com>