systemd: Add patch to split networkd tmpfiles into a separate file

[zmrow]

Issue number:
Related to #2741 and #2449

Description of changes:
It appears I missed some files when I made the networkd subpackage in systemd. These tmpfiles should only be included if the networkd subpackage is included. An upstream patch moves these entries into a separate file for situations such as this, so we include that patch.

The offending journal entries that tipped us off to this mistake looked like:

Feb 24 18:36:39 localhost systemd-tmpfiles[1562]: /x86_64-bottlerocket-linux-gnu/sys-root/usr/lib/tmpfiles.d
/systemd.conf:18: Failed to resolve user 'systemd-network': No such process

    systemd: Add patch to split networkd tmpfiles into a separate file
    
    This commit adds an upstream patch that moves systemd-networkd tmpfiles
    entries into a separate file.  This makes it simpler to include/exclude
    these tmpfiles depending on the inclusion of the networkd subpackage.
    
    The systemd.spec has been updated to exclude this new file, while the
    networkd subpackage explicitly includes it

Testing done:

• Build and boot an aws-k8s-1.24 variant and ensure no messages referring to systemd-network's tmpfiles show up in the journal.

bash-5.1# journalctl | grep -i systemd-network                                                                                                   
bash-5.1# journalctl | grep -i networkd       
bash-5.1#

• Build and boot an aws-dev variant with the systemd-networkd image-feature enabled (and add a dependency on console-getty.service in preconfigured.target since I knew early boot services will fail). Observe the systemd-networkd tmpfiles being created properly and no other networkd-related issues in the journal:

bash-5.1# ls -lah /run/systemd/netif/
total 4.0K
drwxr-xr-x.  5 systemd-network systemd-network 120 Feb 24 21:32 .
drwxr-xr-x. 20 root            root            540 Feb 24 21:32 ..
drwxr-xr-x.  2 systemd-network systemd-network  40 Feb 24 21:32 leases
drwxr-xr-x.  2 systemd-network systemd-network  80 Feb 24 21:32 links
drwxr-xr-x.  2 systemd-network systemd-network  40 Feb 24 21:32 lldp
-rw-r--r--.  1 systemd-network systemd-network 135 Feb 24 21:32 state

bash-5.1# journalctl | grep -i systemd-network
Feb 24 21:32:34 localhost systemd-sysusers[315]: Creating group 'systemd-network' with GID 981.
Feb 24 21:32:34 localhost systemd-sysusers[315]: Creating user 'systemd-network' (systemd Network Management) with UID 981 and GID 981.
Feb 24 21:32:35 localhost systemd-tmpfiles[894]: Reading config file "/x86_64-bottlerocket-linux-gnu/sys-root/usr/lib/tmpfiles.d/systemd-network.conf"…
...

Terms of contribution:

By submitting this pull request, I agree that this contribution is dual-licensed under the terms of both the Apache License, version 2.0, and the MIT license.

[stmcginnis]

Looks good to me!

[bcressey]

I'm OK with a patch for this but we could also just include sysusers.d/systemd-network.conf in the main package so that the user gets created.