Add search expression to the user resource collector

[imp-]

Hello,

Resources collectors are used in this module to define ordering, e.g. create users before podman rootless definitions.
The resource collectors used here will collect all available definitions though, which is a problem in a puppet tree with virtual (user) resources as the collector will attempt to create all of them.

Therefore, in this pull request, I propose to add a search expression to the resource collectors in order to only consider resources for the required users.

Thx,
Jan

[southalc]

I was looking at this and can't figure out why I added the rootless_users parameter and the resource collector in the first place. I'll clean it up and post a new release.