Tracking Issue: Non-implemented tests

[sadlerap]

There's still a lot of tests not yet implemented in the conformance test suite. This issue aims to track outstanding missing tests.

Service Binding tests:

• Binding workloads with a label selector (PR: tests: label selectors in service bindings #16)
• ClusterWorkloadResourceMapping.servicebinding.io resource tests
• Projecting environment variables
• Binding only named containers
• Status handling for failed bindings
• Unbind workloads on ServiceBinding delete
• Unbind workloads on workloadRef change to a new resource

Service tests:

• Validate existence of .status.binding.name
• Validate .status.binding.name points at a valid secret