Feature request: Add optional flag to be able to tag/label all resources created by the test suite

It would be really neat if we could pass in an optional flag to specify a test string to be used as a tag or label applied to any resource created by the test suite, VM, disks etc. This will help with tracking usage per test run and also help with cleanup after a test run should there be any resources remaining after the test suite has been completed or if the tests are interrupted.