Description of problem:
`syspurpose show` fails with '[Errno -2] Name or service not known" when host is unreachable on both registered and unregistered systems

Version-Release number of selected component (if applicable):
subscription-manager: 1.24.2-1.git.142.1f459b1.el8


How reproducible:
Always

Steps to Reproduce:
On a unregistered system 
========================

1 set some values for syspurpose 
ex: # cat /etc/rhsm/syspurpose/syspurpose.json 
{
  "usage": "Production",
  "addons": [
    "addon1",
    "addon2"
  ],
  "role": "foo"
}
2.configure bad hostname in rhsm.conf
# subscription-manager config --list | grep hostname
   hostname = bad-hostname.usersys.redhat.com

3.Execute `syspurpose show`

On a registered system :
=======================

# subscription-manager register
Registering to: subscription.rhsm.stage.redhat.com:443/subscription
Username: username
Password: 
The system has been registered with ID: 9d28d39e-f27a-4171-92b1-81ab40693497
The registered system name is: dell-r730-001-guest13.dsal.lab.eng.rdu2.redhat.com
[root@dell-r730-001-guest13 test]# syspurpose show
{
  "addons": [
    "addon2",
    "addon1"
  ],
  "role": "foo",
  "usage": "Production"
}
System purpose successfully sent to subscription management server.

Configure host name to a bad name


# subscription-manager config --list | grep hostname
   hostname = BADsubscription.rhsm.stage.redhat.com

# syspurpose show
[Errno -2] Name or service not known



Actual results:
# syspurpose show
[Errno -2] Name or service not known

Expected results:
syspurpose show should display the values saved in the local system when host is not reachable on a unregistered system. 

Additional info:
Notice that on registered system with a bad hostname the subscription-manager status continues to show the last known status 

[root@dell-r730-001-guest13 test]# subscription-manager status
+-------------------------------------------+
   System Status Details
+-------------------------------------------+
Overall Status: Invalid

Red Hat Enterprise Linux for x86_64 High Touch Beta:
- Not supported by a valid subscription.

System Purpose Status: Unknown