Products should be able to explicitly export their artifacts to dependent products

Currently, the only right way to use generated artifact as input for another product is "usings" property in the rule of dependent product. This approach have disadvantages:

• one need to modify rule to add new using tags for Rule, which results in "usings" property, containing all possible tags
• it doesn't work for transformers

There should be a more flexible approach:

• don't use "usings" at all, so any dependencies artifacts is added to files list of dependent product
• use some boolean property inside Depends item(e.g. "usings"), that add dependencies artifacts to files list of dependent product