Component: Selection of the install profile/distribution

[nerdstein]

Design reference: https://www.drupal.org/files/issues/2018-03-08/simplytest-ui.png

Create a selection widget for the install profile or distribution to install. This is based on the selection of the major Drupal version, based on the branch/release selected from the project autocomplete.

Examples:

1. if a user enters Drupal as the project and selects 8.5 as the release, the install profile selection should show "standard", "minimal", "testing", or "umami"
2. if a user enters Lightning as the project (which is a distribution), the install profile selection populates with Lightning and is subsequently disabled from selecting anything else

I am not clear on if this can be pulled from an API feed, as these install profiles are in code. I hope we can avoid hard-coding it, but it needs researched.

Details on drupal.org feeds can be found here: https://www.drupal.org/drupalorg/docs/api