shared azure service principal (#224)

* Pass Azure Client Secret and ID into tests

Don't set KOSLI_ level environment variables so the tests have more
control.

* Introduce new secrets

* Reference secrets in workflow

* Do these have to be in the same order?

* Try referencing the sub-worflow at current sha

* Use test workflow from current commit

* Remove use of unused secret

* Always use local-repo workflow at current commit