Clickable doesn't work with qmake projects

[kugiigi]

Describe the bug
Clickable encounters an error when building a qmake project

To Reproduce
Steps to reproduce the behavior:

1. Create a clickable container
2. Try to build a qmake project
3. Gets an error Cannot find feature ubuntu-click

Expected behavior
Project compiles and builds successfully

Additional context
Turns out the package that has the config for ubuntu-click is not available in focal anymore. Clickable work around this by integrating them in the docker images. Here's the MR that added them.
https://gitlab.com/clickable/clickable-docker-images/-/merge_requests/112/diffs

The needed files are ubuntu-click.prf and ubuntu-click-tools.prf

[milikhin]

Now that Ubuntu Touch has support for Docker... I think one way to improve Clickable integration might be to use Clickable docker images directly instead of relying on Libertine chroot containers, which are a little bit of a nightmare to create, update and use :-D