Verify that transient_store is enabled in the default RHIVOS images

Goal:

Create a test that ensures transient_store is enabled in storage.conf in the default RHIVOS images

Background:

the setting transient_store was added for the automotive usecase
The default upstream podman setting for this is false
The RHIVOS images installs a changed setting file with this setting changed to true

Acceptance criteria;

The test runs and reports that transient_store is enabled