Add batch support for various image_ops (#14854)

* Change fix_image_flip_shape to create shape based on rank

* Refactor duplicate code to _EnsureTensorIs4D

* Convert flip_up_down

* Temporarily comment out ValueError Check

* Add batch support for flip_left_right

* Add batch support for random_flip_left_right

* Add batch support for random_flip_up_down

* Add batch support for transpose_image

* Add batch support for rot90

* Correct comments

* Refactor so as not to introduce new method

* Add tests for batch inputs

* Fix test to expect 3 or 4 dims

* Fix misc Pylint issues in image_ops_impl.py

* Fix misc Pyline issues in image_ops_test.py

* Refactor into _flip_image

* Correct Idempotent to Involution

* Check if >20 images were flipped

* Reverse condition in rot90

* Remove duplicate comment

* Address feedback

* Punctuation