Add support for `-b` flag

[timoschinkel]

In version 0.38.0 NVM introduced the flag -b to prevent building Node from source: https://github.com/nvm-sh/nvm/releases/tag/v0.38.0 We are interested in using this flag in our pipelines, because building Node from source is a time consuming operation, and during that time the TC agent cannot pick up other actions. We would prefer to have the build fail quickly. Mostly because the failures a typically caused by network hickups.

Currently the NVM plugin only has an option to enable the -s flag via a checkbox. Is there a possibility to add support for the -b flag in a similar way?

[tvb]

@jonnyzzz Could you look into this one? We need this too!