Override frontend auto-added dependencies with BONFIRE_FRONTEND_DEPENDENCIES env var

[bsquizz]

This will allow teams (like HAC team) who don't need all these components pulled in to be able to customize the list by setting the env var, e.g.:

BONFIRE_FRONTEND_DEPENDENCIES="chrome-service,frontend-configs" bonfire deploy <args> --frontends=true

You can also pass an empty value which will cause no frontend dependencies to be pulled in automatically, e.g:

BONFIRE_FRONTEND_DEPENDENCIES="" bonfire deploy <args> --frontends=true

[Victoremepunto]

Spotted a couple of things may worth revisiting, LMK.

[Victoremepunto]

one last thing, to avoid people shooting themselves in the foot

[Victoremepunto]

LGTM!