[feature request] add builddep support

[berolinux]

One good use of microdnf is replacing dnf while doing a major python upgrade (e.g. 3.8 -> 3.9) that breaks normal dnf until its dependencies are rebuilt -- but right now, microdnf is lacking builddep (quite useful for build scripts...).

Adding builddep would make microdnf make a lot more useful in that context.

[Conan-Kudo]

cc: @rpm-software-management/mock-team, @davidlt, @rwmjones

[hroncok]

See also https://lists.fedoraproject.org/archives/list/[email protected]/thread/6PO54BIX3PWAOLRZ74TX32KA3BO6LFTQ/