* Update upstream OVS debian packaging to be on par with package
  source in Debian/Ubuntu:
  - Provide a openvswitch-switch-dpdk package that integrates with
    the dpdk package in the distributions so that end users can opt
    into a DPDK-enabled Open vSwitch binary.
  - Provide systemd service files.
  - Provide openvswitch-source package for reproducible integrated
    build of for example OVN.
  - Stop building shared library and subsequently remove
    libopenvswitch and libopenvswitch-dev binary packages.

Co-authored-by: Luca Boccassi <bluca@debian.org>
Signed-off-by: Luca Boccassi <bluca@debian.org>
Co-authored-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Co-authored-by: James Page <james.page@ubuntu.com>
Signed-off-by: James Page <james.page@ubuntu.com>
Co-authored-by: Corey Bryant <corey.bryant@canonical.com>
Signed-off-by: Corey Bryant <corey.bryant@canonical.com>
Signed-off-by: Frode Nordahl <frode.nordahl@canonical.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>