Adapt SSO and ASGs test for disabled v2 setup

[jochenehret]

What is this change about?

Adapt SSO and ASGs test for a CF deployment with disabled v2 API.

Please provide contextual information.

Part of the v2 deprecation story: cloudfoundry/community#941

What version of cf-deployment have you run this cf-acceptance-test change against?

v44.5.0 with temporary_enable_v2 set to false

Please check all that apply for this PR:

• introduces a new test --- Are you sure everyone should be running this test?
• changes an existing test
• requires an update to a CATs integration-config

Did you update the README as appropriate for this change?

• YES
• N/A

How many more (or fewer) seconds of runtime will this change introduce to CATs?

No change in runtime behaviour.

What is the level of urgency for publishing this change?

• Urgent - unblocks current or future work
• Slightly Less than Urgent