dev: Consolidate enterprise Procfile into a single Procfile

Created by: keegancsmith

In a series of commits we transform both Procfiles to be identical, and then switch to just using ./dev/Procfile. Going forward this means we will only need to maintain a single Procfile for our development environments.

Test plan: ./dev/launch.sh and ./enterprise/dev/start.sh and test what happens when modifying go files.