Cleanup IPDK build by building and packaging independent packages outside of IPDK build itself

[mestery]

Currently, the IPDK build (in particular, the P4-DPDK backend) builds a lot of dependent packages:

• P4-OVS
  • p4runtime
  • stratum
  • protobuf
  • SAI
• P4C compiler
• P4-DPDK
  • DPDK
  • TDI
  • target-syslibs
  • target-utils

Ideally, we would move to a world where each of those build targets generate their own packages, and IPDK becomes the CLI to manage IPDK container images, and any glue logic required to build the IPDK containers. In this world, we're not pulling down and building everything each and every time, which takes well over an hour for the P4-DPDK version of IPDK.