[ZeRO] Fixes issue with embedding resize

[jeffra]

What does this PR do?

Fixes #16008.

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Who can review?

@stas00

[HuggingFaceDocBuilderDev]

The documentation is not available anymore as the PR was closed or merged.

[stas00]

Thanks a lot for the fix, Jeff.

It probably means this path isn't being tested on our side.

And I also run all the tests locally - all pass.