Fixes#9279
- Why I did it
Part of larger effort to move all SONiC systems to bullseye
- How I did it
1. Update container makefiles with correct dependencies
2. Update container Dockerfile with correct base image
3. Update container Dockerfile with correct apt dependencies
4. Update any other makefiles with dependencies to remove python2 support
5. Minor changes to support bullseye / python3
- How to verify it
Run regression on the switch:
1. Verify PTF community tests work
2. Verify syncd runs and all ports come up / pass traffic
3. Verify all platform tests succeed
