[python] Restore soma indexer in hvg

[ebezzi]

Previously removed due a memory bug, now fixed by https://github.com/single-cell-data/TileDB-SOMA/issues/2662

[codecov[bot]]

Codecov Report

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

Project coverage is 91.12%. Comparing base (a5b0040) to head (f689d57). Report is 2 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1184 +/- ## ======================================= Coverage 91.12% 91.12% ======================================= Files 77 77 Lines 5902 5902 ======================================= Hits 5378 5378 Misses 524 524 ``` | [Flag](https://app.codecov.io/gh/chanzuckerberg/cellxgene-census/pull/1184/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=chanzuckerberg) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/chanzuckerberg/cellxgene-census/pull/1184/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=chanzuckerberg) | `91.12% <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=chanzuckerberg#carryforward-flags-in-the-pull-request-comment) to find out more.

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[ivirshup]

The issue before was memory, right? Would you want to introduce a memory test here?

I've been using https://github.com/bloomberg/pytest-memray for this

[ebezzi]

The issue before was memory, right? Would you want to introduce a memory test here?

I've been using https://github.com/bloomberg/pytest-memray for this

That would be great. This should be part of the upcoming "expanded regression testing" work for sure.