Fix interface for stability and consistency

[alanturing-bluemirrors]

This PR is to apply changes to the current interface based on the issues or misconfigurations identified during development.

Identified issues:

• init() method in ICore accepts parameters classes which is biased to object detection and doesn't have application in other use cases such as: Image Text Matching (no classes to process), Background removal (no classes to process), etc.

Steps to regain control of the interface:

• Fixing the ICore interface: Remove the parameter classes as it has minimal use in the interface. Re-arrange the interface call from the init() method in Yolov5 core to ensure consistency with development.

Tests performed:

• Evaluated the branch once the changes were published, ran a benchmark script to test the functionality. It doesn't seem to break the code. (Preliminary test)

DO NOT MERGE THE PR UNTIL THE THREE MAINTAINERS HAVE VERIFIED AND APPROVED THE CHANGES

[makaveli10]

@alanturing-bluemirrors @mavihs7 are you guys still working on this ? This looks good to me. thanks for putting this together