Submit test requests through HTTP POST request

[bookwar]

We'd like to use Koschei as a service which provides rebuild results for CI pipelines, so that these results can be used in Gating. See https://pagure.io/fedora-ci/general/issue/45

Ci pipeline (Jenkins job) will prepare the inputs (list of new packages and the tag in koji) and then send a request for Koschei service to verify that these new packages will not break the rebuild of older ones.

We need a possibility for CI pipeline to request such test through a HTTP request to Koschei

[lachmanfrantisek]

I just found this when searching for a way to provide a similar check for Packit users. Would it be hard to do this in Koschei? It would be nice to integrate a tool that has been created for this purpose instead of creating something new.

We can also provide (test) SRPM to be used during the check.

Our main use-case is similar to what @bookwar has -- to do this when opening a PR in distgit. We can also provide this to upstream projects if there is interest and enough capacity.

Thanks in advance for any response!
František