[Maverick] Better first experience with Detox

[jamonholmgren]

Describe the bug

Detox has some implicit dependencies -- python and applesimutils. When you run Detox tests and don't have those installed, it fails with semi-obscure errors. Let's make that experience better.

Ignite version

Maverick

Additional info

no

[frankcalise]

Also it's real annoying to get Python2.7 installed these days, I was going to upgrade the download script to work for that or Python3.

[frankcalise]

Also let's detect the simulator name to use

[markrickert]

Going to close this one as i don't see us going back to using detox regularly anytime soon.