Have tor operate on different ports by default for alpha, release and nightly Tor Browser builds

The change in legacy/trac#28546 (moved) changes the default install directory based on build (release, alpha, or nightly) for windows, and legacy/trac#28809 (moved) will do the same for macOS.

It would be nice if we could run these different builds simultaneously by having tor listen to different ports by default so that we do not need to kill our existing running Tor Browser instance or manually change the port settings ourselves.