* Add PKI test for delete role
- Create a role, validate that defaults are what we expect
and delete the role, verifying it is gone on subsequent read
attempts.
* Add PKI test for crl/rotate command
- Missing a unit test that validates the crl/rotate command works. The test validates the rotate command was successful
by checking if we have a different/new update time on the CRL.
* Rework PKI TestBackend_PathFetchValidRaw test to not write directly to storage
- Rework the existing test to not write directly to storage as we might change that in the future.
- Add tests that validate the ca_chain behaviour of not returning the root authority cert
* PR Feedback
* Additional PR feedback
* Disallow adding CA's serial to revocation list
* Allow disabling revocation list generation. This returns an empty (but
signed) list, but does not affect tracking of revocations so turning it
back on will populate the list properly.
