Move the LabCAS integration into the ML framework

[asitang]

Currently, a lot of LabCAS related tasks are being triggered from withing the files that contain the implementation of functions for a particular ML (Neuclei detection) endpoint. These things will be repetitive and will need to be done for each such new ML model and its endpoints. So, all the LabCAS related tasks should be automated within the ML framework of the code.