Update training script for txt to img sdxl with lora supp with new interpolation.

[RogerSinghChugh]

What does this PR do?

Updates the training script for txt to img sdxl with lora support as per #11390

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you read the contributor guideline?
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• Was this discussed/approved via a GitHub issue or the forum? Please add a link to it if that's the case.
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  here are tips on formatting docstrings.
• Did you write any new necessary tests?

Who can review?

@asomoza

[asomoza]

thanks @RogerSinghChugh, for contributing in diffusers you have to format the code, can you run these two commands on the console:

make style
make quality

If for some reason you can't run them, I can run a bot that does this for you, but it's always better to run it yourself, specially for larger contributions of code with multiple reviews.

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

[RogerSinghChugh]

thanks @RogerSinghChugh, for contributing in diffusers you have to format the code, can you run these two commands on the console:

make style make quality

If for some reason you can't run them, I can run a bot that does this for you, but it's always better to run it yourself, specially for larger contributions of code with multiple reviews.

Hey @asomoza sure, I just ran those commands and updated my code.

[asomoza]

thanks!