Description of problem:
Remove the duplicate option 'update_interval' for virt-who config cli, ui and api. Because option 'update_interval' has already been deleted from virt-who package.
reference from bug
Bug 1990562(https://bugzilla.redhat.com/show_bug.cgi?id=1990562) - [Nutanix] Remove the duplicate option 'update_interval' in virt-who config file

Version-Release number of selected component (if applicable):
Satellite6.13.0 snapshot9.0
katello-4.7.0-1.el8sat.noarch
rubygem-foreman_virt_who_configure-0.5.11-1.el8sat.noarch
rubygem-hammer_cli_foreman_virt_who_configure-0.0.9-2.el8sat.noarch

How reproducible:
100%

Expected results:
Remove the duplicate option 'update_interval' for virt-who config cli, ui and api

Additional info: