fix(service-registry create): fetch registry URL after creation

[rkpattnaik780]

rhoas service-registry create now fetches registry URL and shows correct compatibility endpoints.

Closes #1574

Verification Steps

1. Run the following command to create a registry:

rhoas service-registry create

2. You should be able to see the registry URL along with compatibility endpoints once creation is successful.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation change
• Other (please specify)

[wtrocki]

Trick is that this is async call so when I run this pointed to local it can still return nil

Suggested change

	compatibleEndpoints := registrycmdutil.GetCompatibilityEndpoints(registry.GetRegistryUrl())
	if registry.GetRegistryUrl() != nil {
	compatibleEndpoints := registrycmdutil.GetCompatibilityEndpoints(registry.GetRegistryUrl())
	} else {
	// To get list of compatible endpoints please run `describe` command
	}

[wtrocki]

I have run this with local service registry for testing. I think in more than 70% of cases without huge load users should see endpoints anyway.