Improve unit test coverage (#1095)
* Improve unit test auto-detection
* Use default model options
* Add mgp_str unit tests
* Add janus processing unit tests
* Add jina_clip processor unit tests
* Fix typo in filename
* Create `rand` tensor function
* Add VitPose unit test
* Add sam modelling unit test
* Improve pipeline unit tests
* Add image utilities unit testing
* Add image segmentation pipeline unit tests
* Add zero-shot classification pipeline unit test
* Move pipeline unit tests to subfolder
* Add instanceof checks
* Add image feature extraction pipeline tests
* Add feature extraction pipeline unit tests
* Add zero-shot object detection pipeline unit tests
* Add depth estimation pipeline unit test
* Add automatic speech recognition pipeline unit test
* Fix typo
* Add text to audio pipeline unit tests
* Add image to text pipeline unit test
* Add image to image pipeline unit test
* Add zero-shot audio classification pipeline unit test
* Fix typo
* Add summarization pipeline unit test
* Add text2text generation unit test
* Add text2text generation pipeline unit test
* Remove unused variables
