Fix Copying Mechanism typo/bug

[tolgacangoz]

What does this PR do?

"# copied from ..."s don't trigger the Copying Mechanism; thus they are capitalized. Also, decorators need to be at the top of "# Copied from ..."s.

The _convert_to_karras function in scheduling_dpmsolver_sde.py and scheduling_lms_discrete.py also has this typo (?). But, it is included in a TODO task in the comments where they copied from, thus leaving them as are.

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@sayakpaul @yiyixuxu @DN6

[yiyixuxu]

thanks!

[stevhliu]

Thanks, there were a couple of # copied from ... that weren't capitalized.

[HuggingFaceDocBuilderDev]

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[tolgacangoz]

Thanks for merging!