Add a socket_service definition

[ekohl]

For systemd socket activated services it's needed to have both the .socket and .service unit defintions in place when starting the service. Prior to 97dd16fa32886b5b0f77a6f38a4953d4c1511c0e the systemctl daemon-reload took care of it, but now this must be done explicitly.

This new defined type makes it easy and reduces the burden on modules that define the unit/service pair.

I haven't tested this yet, but submitting it early so I can run CI on it and link it elsewhere.

[puppet-community-rangefinder[bot]]

systemd::socket_service is a type

that may have no external impact to Forge modules.

This module is declared in 8 of 576 indexed public Puppetfiles.

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[ekohl]

In https://github.com/theforeman/puppet-pulpcore/pull/199 I'm testing if the approach works. A draft until then.

[ekohl]

This now fails on https://tickets.puppetlabs.com/browse/MODULES-11018. I'll add a workaround.

[ekohl]

I've rebased this, but too tired to fix the dependency cycles now.