Add a e2e test that runs some demo WebAssembly applications
using the dedicated containerd shims.

Note: this is not an integration test because we need to install some
binaries (the special containerd shims) on the host.
Signed-off-by: Flavio Castelli <fcastelli@suse.com>
(cherry picked from commit f82d438f)
Signed-off-by: Brad Davidson <brad.davidson@rancher.com>