What does this PR do?

This PR implements a FastImageProcessor for the the VideoMAE model using BaseImageProcessorFast. Related #36978

Note:

1. I was not able to run test_can_compile_fast_image_processor as I'm using a M1 and don't have access to a NVIDIA GPU.
2. The test implemented in the method test_slow_fast_equivalence_batched is only able to pass when all images in the batch have a fixed width and height (by setting equal_resolution=True in the self.image_processor_tester.prepare_image_inputs). If the width and height vary across videos, then there is a low chance of passing this test, i.e. it doesn't fail every time.

Other than that, all tests passed.

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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• Did you write any new necessary tests?

Who can review?

@yonigozlan

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