hsr: add support for HSRv1/2012 protocol

Introduces a new protocol enum value called Hsr2012.

Protocol version is included as part of protocol property, because
they are directly tied together, and configuring them separately
would be error prone.

Test case included.

Resolves: https://issues.redhat.com/browse/RHEL-100763

Signed-off-by: Jan Vaclav <jvaclav@redhat.com>