jammy-amd64-tf-a-build-next: add Dockerfile

The 'Dockerfile' was copied from the tf-a-main-build job.
However, might actually need to play with some of the
PKG_DEPS.

Signed-off-by: J-Alves <joao.alves@arm.com>
Change-Id: Ibb00d7971d4dddc30f7d8464cf788474b272b0e4
1 file changed