Support testing actions in aspects

[comius]

Current implementation doesn't collect actions from aspect.

This is by design, because testing_aspect is never applied over another implementation specific aspect and thus cannot see actions created by it.

Proposed design:

• Add a function utils.make_testing_aspect that accepts implementation specific aspect and collects providers and actions from it
• Extend analysis_test and make it possible to override testing_aspect with a custom one.

This way we keep all the functionality that collects data from targets and aspects.

[comius]

cc @rickeylev @matts1