LEditsPP - examples, check height/width, add tiling/slicing

[hlky]

What does this PR do?

• Updates examples to use variant="fp16", load_image from diffusers.utils, enable vae tiling, resize the image to 512x512 and 1024x1024 for XL
• Add indexing="ij" to torch.meshgrid to fix the warning
• Add enable_vae_slicing, disable_vae_slicing, enable_vae_tiling, disable_vae_tiling
• Check the input height/width parameters and the image's height/width are a multiple of 32.

LEditsPPPipelineStableDiffusion

Original	LEditsPP

LEditsPPPipelineStableDiffusionXL

Original	LEditsPP

Fixes #10287

Who can review?

Anyone in the community is free to review the PR once the tests have passed. Feel free to tag
members/contributors who may be interested in your PR.

@linoytsaban

[HuggingFaceDocBuilderDev]

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[linoytsaban]

Thanks so much for this @hlky 🙌🏻🙌🏻