[baremetal] Retire example pod_config.yaml

[baremetal] Retire example pod_config.yaml

It is easier to just generate the `pod_config.yaml` file than to
maintain it, so let's remove it.

While at it, link sample PDF/IDF inside pharos git submodule, so we
don't have to pass a different lab-config URI to use the sample.

To generate pod_config.yml for the sample PDF/IDF:
$ ./ci/deploy.sh -l local -p pod1 -s os-odl-nofeature-ha -d
$ cat mcp/deploy/images/pod_config.yml

JIRA: FUEL-322

Change-Id: If5898f92ef54bebc31d57f9632959e9093a89250
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>