Run SDK AMD64 image tests in the i386 VM

As the SDK image is supposed to run in a virtual machine,
there is no need to run its tests in a board.

This commit changes the LAVA profile configuration so the
SDK AMD64 image tests will be executed using the i386 device
(virtual machine).

Reviewed-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Luis Araujo <luis.araujo@collabora.co.uk>
Differential Revision: https://phabricator.apertis.org/D4175