fixed deprecation error for euler_discrete scheduler steps offset

[mariopenglee]

What does this PR do?

In accordance to the deprecation message: deprecate("steps_offset!=1", "1.0.0", deprecation_message, standard_warn=False) is outdated. "steps_offset should be set to 1 instead of 0. Please make sure to update the config accordingly as leaving steps_offset might led to incorrect results in future versions. If you have downloaded this checkpoint from the Hugging Face Hub, it would be very nice if you could open a Pull request for the scheduler/scheduler_config.json file"

I changed the default value to 1 and edited the documentation to reflect the changes.

Before submitting

• [X] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• [X] Did you read the contributor guideline?
• [X] Did you read our philosophy doc (important for complex PRs)?
• [ ] Was this discussed/approved via a GitHub issue or the forum? Please add a link to it if that's the case.
• [X] Did you make sure to update the documentation with your changes? Here are the documentation guidelines, and here are tips on formatting docstrings.
• [X] Did you write any new necessary tests?

Who can review?

@yiyixuxu

[yiyixuxu]

hey! thanks for the PR but we cannot accept it that deprecation message is sent only from SD pipelines - changing the default will break some other pipelines when using this scheduler

this is somewhat related https://github.com/huggingface/diffusers/pull/7128

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