Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1858855

Description of problem:
I know that one of the requirements is that IPv6 doesn't support compute resources, but when you try to create one, it doesn't fail gracefully.

Version-Release number of selected component (if applicable):
6.8.0_snap 9

How reproducible:
100%

Steps to Reproduce:
1. Have all ipv6 connection setup.
2. Create proxy on firefox to access UI
3. Login on UI, Infrastructure -> Compute Resources
4. Select EC2 from dropdown menu and fill in all necessary info
5. Click submit.

Actual results:
Oops, we're sorry but something went wrong Network is unreachable - connect(2) for <ip> (Errno::ENETUNREACH)

Expected results:
At least stay on satellite with a better error message.

Additional info:
Any compute resources provider fails the same way. Is there a way we make this error handle better on the UI?