Add lint rule for "~ppa" in version strings

[uraltun]

Added a check requiring "~ppa" in the version string for PPA uploads and the opposite for archive uploads. Includes a change to the Context object required to pass in the upload profile to detect upload destination, as well as a test for the new linter.

Also added a new ppa profile which runs when an upload is meant for a PPA. Currently only includes the newly added check.

Open to feedback on the hook name, as well as whether or not it should count as a fail for PPA uploads instead of a warn (I think why not, though I may have missed valid contexts for doing so).

[enr0n]

Thanks! I think this is a good addition overall, just some requests on the implementation.

[enr0n]

Hm, I am not sure it makes sense to add this to Context. It's mean to wrap generic things about the package itself. But this check is really a pure dput hook; it doesn't make sense to run this check except when uploading, because it depends on the upload target.

It would be different than the other checks so far, but I think it might make more sense to write this as a pure hook in dput.py.

[uraltun]

I agree it doesn't feel great to add this to context for essentially a single hook, but adding this as a pure hook in dput.py also breaks with the existing architecture of this repo.

I would argue enlarging the context object makes more sense than essentially bypassing half your work by adding a pure hook, since the upload target is context and arguably could be used by other hooks, but I'll leave it up to you which way you prefer the implementation.

[enr0n]

Let's go with the pure dput hook for now. It doesn't really feel like it's bypassing anything substantial to me.

Also, the dput hooks may ultimately be upstreamed to dput-ng anyways. That's part of why they are separated like this