CI: use ubuntu-22.04 image (Linux only)
Use the same vm_image as the other Linux CIs in ArmVirtPkg, EmulatorPkg,
and OvmfPkg. Switch over to ubuntu-22.04 from ubuntu-latest.
Signed-off-by: Oliver Steffen <osteffen@redhat.com>
Reviewed-by: Michael Kubacki <michael.kubacki@microsoft.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Chris Fernald <chfernal@microsoft.com>