test(fwu): validate scenario of invalid FWU IMAGE SIZE

Corresponding tf_config and group config to run test

Signed-off-by: Thaddeus Gonzalez-Serna <Thaddeus.Gonzalez-Serna@arm.com>
Change-Id: Iefeee382f38763d165ae9b649a1f97431a5ec57b
6 files changed