Fix(StaticBatchSampler): fix statics of num_consumed_samples_in_epoch for ckpt

[li126com]

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Motivation

When we save the checkpoint and reload it, the loss values cannot be aligned. The reason is that the saved index of the dataloader batch is lagging behind by one batch, causing a misalignment in the dataset.

Modification

Move the code position above 'yield' to ensure the correct tracking of the dataloader batch position.

BC-breaking (Optional)

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If so, please describe how it breaks the compatibility and how the downstream projects should modify their code to keep compatibility with this PR.

Use cases (Optional)

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Checklist

Before PR:

• Pre-commit or other linting tools are used to fix the potential lint issues.
• Bug fixes are fully covered by unit tests, the case that causes the bug should be added in the unit tests.
• The modification is covered by complete unit tests. If not, please add more unit test to ensure the correctness.
• The documentation has been modified accordingly, like docstring or example tutorials.

After PR:

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[sunpengsdu]

LGTM