Fix project template test issues

* Update template baseline test to use original file name
* Enable more tracing & dump collect in helix test runner
* Disable test parallelization for project template tests
* Ensure project directory name uniqueness
* Fix tests using skip attributes but not using ConditionalFact/ConditionalTheory attributes
* Print test timeout message from Helix test runner
* Add timestamps to helix runner console logs
* Increase helix timeout for project template tests
* Skip LocalDb template tests on non-Windows platforms
* Update test cmd args in TestRunner.cs to modern, documented versions
* Split up long-running theories to avoid test timeouts
* Remove template test locks
* Skip template tests on Debian11.Arm as they take too long to run there
* Updated README with details about test timeouts & conditional tests

Co-authored-by: Hao Kung <HaoK@users.noreply.github.com>