Consider testing component status validation generically, in `ComponentSourceTestBase`

Overview

See https://git.drupalcode.org/project/canvas/-/merge_requests/378#note_634030

It might be helpful to generically test that a component cannot be enabled (at least, not without validation getting mad) when it doesn't fulfill requirements. Right now we are testing this in a once-off way for each component type, but now that component candidate discovery is much saner, testing it generically is probably possible, and may be a good idea.

Proposed resolution

Decide whether or not to test this scenario generically, and do it if we choose.

User interface changes

None. This only touches tests.