upload external pr kpi for 10 days in the past (#102780)
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### <samp>🤖 Generated by Copilot at 963044b</samp>
The pull request improves the reliability and completeness of the external contribution stats collection and upload. It adds a `time` delay to avoid API rate limit errors in `upload_external_contrib_stats.py`, and changes the order and date range of the commands in `nightly-rockset-uploads.yml`.
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### <samp>🤖 Generated by Copilot at 963044b</samp>
> _Oh we are the coders of the open source sea_
> _And we pull and we push with the `git` command_
> _We upload the stats of the external PRs_
> _With a ten-day range and a `time` delay_
Pull Request resolved: https://github.com/pytorch/pytorch/pull/102780
Approved by: https://github.com/kit1980
