Fixes #33025 - allow filtering hosts by user id

Users would like to set filters so users can only see reports of hosts
they own.

For that we can define an association on a Report based on the Host
ownership. Then we can add a scoped search definition that could be used
in Filter definition. The resulting scoped search term that can be used
on any Report subclass is

```
host_owner_id = current_user
```

Instead of `current_user`, a specific user ID can be used too.

This will not take user group ownership into the consideration due to
the complexity, especially when tree structure of user groups is
considered.