ci: test the new rot dev keys

Use the 3k and 4k dev rot keys for some configs,
Create a configuration that supports both build and test
for an ECDSA SWD RoT key.

Signed-off-by: Ryan Everett <ryan.everett@arm.com>
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: I93a20da0e08fce356411ddc04494e62db9d8fb47
8 files changed