Define pull request Copr build job in Packit config

[lbarcziova]

Hi! As described in #1760 (comment), Packit is planning to require explicit build job definition for the testing jobs (see packit/packit-service#1775). Adding the explicit Copr build job should also prevent the current bug in Packit related to the usage of implicit build job + identifiers, which was brought up in the linked PR.

[psss]

Thanks for preparing the config adjustment. So this means that we will see twice as many results in the testing overview, right? One for rpm-build and one for testing-farm. I'd say it's ok although the concise overview was perhaps a little bit better. @lukaszachy, @happz, @thrix, any thoughts here?

[lbarcziova]

So this means that we will see twice as many results in the testing overview, right? One for rpm-build and one for testing-farm.

You will see the rpm-build statuses as well, that's right.

The reason for the change is that we have implemented another feature where the build is a prerequisite for another job + the functionality regarding tests is still growing (identifiers, targets mapping, skipping the build), and this will make maintaining the code much easier for us.

[psss]

Understood. Thanks for clarification.