Fixes #37015 - Refactor OwnerClassifier

- Introduce `classify_owner` class method for owner classification.
- Implement private method for input validation.
- Add error handling to raise the necessary exceptions.
- Add deprecation warning to the `user_or_usergroup` method.

Fixes #37087 - STI preparations for Ruby 3.0

Some of our STI models (host and subnet) have redefined initialization
method signature, which cause failures in code logic due to Ruby 3.0
more strict way of dealing with keyword arguments. As a first step
we must to comply with Rails' model initialization method signature....

Refs #36575 - Avoid i18n during startup in owner_type validation

Fixes: 535d232934a5 ("Fixes #14013 - add a setting for default owner of new hosts")

Fixes #36796 - Make host_facts_updated event visible

Fixes #36466 - Allow gathering information on deleted records

Fixes #36104 - Distinguish host events

Fixes #36394 - Add infra facet search validators

Fixes #35846 - allow Host searching by PXE loader

Fixes #35845 - Searching hosts should be possible by all reported data

When bios information was introduced in PR #9497, the searching was
not added. This make all host reported data searchable.

Fixes #35843 - add alias for configuration_status searching

Historically, the configuration status was the only status users can
search hosts by. When sub-statuses were introduced we kept "status" as
the search term representing the configuration status. However with many...