[DEVX-371]: Export from Clarifai Platform to other formats

[sanjaychelliah]

Feature

Export to other formats(COCO,VOC) from Clarifai Platform

#clarifai SDK
#export CLARIFAI_PAT={your personal access token}  # set PAT as env variable
from clarifai.client.dataset import Dataset
dataset = Dataset(user_id="user_id", app_id="app_id", dataset_id="dataset_id",dataset_version_id='version_id')
dataset.export(save_path='output.zip')

#Extract the zip file and pass the folder to ImageAnnotations
from clarifai_datautils import ImageAnnotations
clarifai_dataset = ImageAnnotations.import_from(path='folder_path',format= 'clarifai')

#export to other formats
clarifai_dataset.export_to(path='output_path',format='coco_detection',save_images=True)

Tests

• Added tests for the clarifai format

[sainivedh]

Some refactor changes