tests: add service file test pipeline and use it in in a few packages

[justinvreeland]

The tar lines, while I don't like fix an issues that systemd-analyze
verify found where symlinks are turned into real files. Test was moved
forward in the pipeline because we don't have install via file lists
and otherwise other packages will pickup the test files when they shoulnd't.

All the service files aren't 100% clean but they're not longer failing.

This should probably also have a warning linter like ldd or docs do.

[justinvreeland]

huh, compression is probably a waste of resources since I just want it to track the links and attrs for me.

[a-crate]

It would be nice to optionally install -doc or -docs and enable man checking if those exist but I think that would require melange changes to do in a clean way.

[justinvreeland]

It would be nice to optionally install -doc or -docs and enable man checking if those exist but I think that would require melange changes to do in a clean way.

Ohhh that I wanted those tests to run but forgot I could just install packages.

This should be doable by taking another input variable. We can then pop the tests on the package with withdocs: true and then install the packages that have the service file as part of the environment for the docs tests. Could probably even check if the name of the package is doc and then enable the flag and assume the tester added the packages with the service files to the environment. Failure on empty helps there as well in case you installed no service files in the doc env. Not as idea as a system where melange can manage it all but should be doable.