Rename sgkit_sample_id

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 93.23%. Comparing base (a803933) to head (24d010d).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #947 +/- ## ======================================= Coverage 93.23% 93.23% ======================================= Files 18 18 Lines 6299 6299 Branches 1139 1139 ======================================= Hits 5873 5873 Misses 290 290 Partials 136 136 ``` | [Flag](https://app.codecov.io/gh/tskit-dev/tsinfer/pull/947/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=tskit-dev) | Coverage Δ | | |---|---|---| | [C](https://app.codecov.io/gh/tskit-dev/tsinfer/pull/947/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=tskit-dev) | `93.23% <100.00%> (ø)` | | | [python](https://app.codecov.io/gh/tskit-dev/tsinfer/pull/947/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=tskit-dev) | `95.65% <100.00%> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=tskit-dev#carryforward-flags-in-the-pull-request-comment) to find out more.

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