The `CMP0022-WARN-tll` case overrides legacy properties set by
`target_link_libraries` so that we can verify that the policy
warning is emitted.  When building in the Debug configuration,
the `_DEBUG` variant of the legacy property is set/checked too.

Fix the test case to override both variants.  Previously it only
passed because `cmComputeTargetDepends::AddInterfaceDepends`
always evaluated dependencies with the "" configuration.