Migration of masked_image_modeling_with_autoencoders to keras 3 (#2275)

* feat: migration of masked_image_modeling_with_autoencoders from keras 2 to keras 3

* feat: migration of masked_image_modeling_with_autoencoders from keras 2 to keras 3

* fix: refactor MAE to be backend-agnostic , corrected data pipeline mapping logic

* fix: mae print

* update backend

* fix: black formatting

* fix: changed as per comments

* fix: addressed the review

* fix: black format

* fix: corrected the docstring

* fix: add the evaluation images

* feat:add ipynb & md file

Author: maitry63