[python] Use bindings for `SOMAGroup` 3/5

[nguyenv]

Issue and/or context:

This is on top of https://github.com/single-cell-data/TileDB-SOMA/pull/2732

Changes:

• Replace GroupWrapper (tiledb.Group) with SOMAGroupWrapper (clib.SOMAGroup)
• Remove _reader_wrapper_type as we now use clib.SOMAObject for all classes
• Use a mapper in _tdb_handles.open instead of if-else statements
• Create from_soma_group_entry to place clib.SOMAObjects into GroupEntry
• Remove duplicated "Check ms" test

Notes for Reviewer:

This PR completes the move over for SOMAArray and SOMAGroup to use the C++ bindings. There will be several more PRs on top of this to remove tiledb-py completely.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 92.53731% with 5 lines in your changes missing coverage. Please review.

Project coverage is 89.32%. Comparing base (c33f934) to head (9fed916).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2735 +/- ## ========================================== - Coverage 89.91% 89.32% -0.60% ========================================== Files 37 37 Lines 4026 4037 +11 ========================================== - Hits 3620 3606 -14 - Misses 406 431 +25 ``` | [Flag](https://app.codecov.io/gh/single-cell-data/TileDB-SOMA/pull/2735/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=single-cell-data) | Coverage Δ | | |---|---|---| | [python](https://app.codecov.io/gh/single-cell-data/TileDB-SOMA/pull/2735/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=single-cell-data) | `89.32% <92.53%> (-0.60%)` | :arrow_down: | 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=single-cell-data#carryforward-flags-in-the-pull-request-comment) to find out more. | [Components](https://app.codecov.io/gh/single-cell-data/TileDB-SOMA/pull/2735/components?src=pr&el=components&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=single-cell-data) | Coverage Δ | | |---|---|---| | [python_api](https://app.codecov.io/gh/single-cell-data/TileDB-SOMA/pull/2735/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=single-cell-data) | `89.32% <92.53%> (-0.60%)` | :arrow_down: | | [libtiledbsoma](https://app.codecov.io/gh/single-cell-data/TileDB-SOMA/pull/2735/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=single-cell-data) | `∅ <ø> (∅)` | |