Refs #24072 - fix selecting hostgroup with compute resource

Without this fix, the 'Virtual Machine' tab was giving:

'mybox' not found on 'libvirt (Libvirt)' 'mybox' could
   be deleted or 'libvirt (Libvirt)' is not responding.

Fixes #24022 - unattended error input is UTF-8 friendly (#5761)

Fixes #24109 - common kernelcmd param for all OSes

Fixes #23196 - Add default values for cores and socket in VM

Fixes #23808 - monotonic timer to measure durations

Fixes #23920 - add missing header in welcome pages

Fixes #24057 - Email subject prefix accepts long strings (#5742)

Fixes #23994 - Do not update templates out of scope

Fixes #23991 - rephrase RSS setting description

Fixes #18765 - finish script use FQDN when IP is missing

This is resurrect of

https://github.com/theforeman/foreman/pull/2171/files

The old patch did not pass review because I was unable to explain the
motivation. The reason for the fallback is that only cloud compute...