Install diener from paritytech repository

[joao-paulo-parity]

Alternative to https://github.com/paritytech/pipeline-scripts/pull/46/files#diff-df602127cd49392d5fb1da82c27351842395a47e788e0c6a77cf52d690ed1d2aR500 where instead of installing diener for every check-dependent-* job, we instead bake the binary into the image. That would be better than having to download and install it for each job.

Related to paritytech/diener#15

[chevdor]

Another option that could benefit other CI scripts would be to propose a PR so diener releases include a deb.
There are several benefits, one of them being we can drop installing the rust toolchain, which is in some cases possible, and save lots of disk and build time.

[joao-paulo-parity]

propose a PR so diener releases include a deb

IMO better than a deb would be a statically-linked PIE binary. In fact we already have a project like that https://gitlab.parity.io/parity/opstooling/gitlab-guard/-/blob/957b3fd4a51dbc01daf5830b51d7769f03ceb4d2/build#L6-L9 so I think the build command could simply be copied for starters.

[bkchr]

Proper solution is here: paritytech/cumulus#1344