fix,chore,refactor(Egen): replaced aip with aiplatform and k80 GPU wi…

…th T4 GPU, changed the versions of images,.keras extension added when saving and uploading the model, removed import statement of os module, refactored code according to template guidelines and performed linter test. (#3213)

Co-authored-by: krishr2d2 <krishna.movva@egen.ai>