Log test case exceptions instead of just throwing

Currently we log that a test failed, but don't log the exception. This is problematic if you're running the tests in an environment where the exception isn't captured and logged (E.G. AzureDevops will automatically log exceptions to a build or release log.) Might be worth it to log the exception before throwing.

Logging to-do's:
- [x] Log test case exceptions instead of just throwing
- [x] Make sure logging from ExecuteTestCase is at a uniform level (prefer Debug as much as possible)
- [ ] Update logging around serializing JSON