[python] Re-enable tiledbsoma.ExperimentAxisQuery

[johnkerl]

Issue and/or context: After 1.15.0 was tagged, we found that users can no longer instantiate tiledbsoma.ExperimentAxisQuery.

Repro:

import scanpy as sc
import tiledbsoma
import tiledbsoma.io
import tempfile

pbmc3k = sc.datasets.pbmc3k()
sc.pp.calculate_qc_metrics(pbmc3k, inplace=True)

tmpdir = tempfile.TemporaryDirectory().name
tiledbsoma.io.from_anndata(tmpdir, anndata=pbmc3k, measurement_name="RNA")

exp = tiledbsoma.Experiment.open(tmpdir)

exp.obs.read().concat().to_pandas()
exp.ms["RNA"].var.read().concat().to_pandas()
exp.ms["RNA"].X["data"].read().coos().concat()
exp.obs.read(
    coords=[slice(0, 99)],
    value_filter="total_counts > 4000",
    column_names=["soma_joinid", "obs_id", "total_counts"],
).concat().to_pandas()
exp.ms["RNA"].var.read(
    value_filter="var_id in ['ANXA1', 'IFI44', 'IFI44L', 'OAS1']",
    column_names=["var_id", "gene_ids", "mean_counts"],
).concat().to_pandas()

with tiledbsoma.ExperimentAxisQuery(
    experiment=exp,
    measurement_name="RNA",
    obs_query=tiledbsoma.AxisQuery(
        value_filter="n_genes_by_counts > 1000",
    ),
    var_query=tiledbsoma.AxisQuery(
        value_filter="n_cells_by_counts > 100",
    ),
) as query:
    assert (query.n_obs, query.n_vars) == (532, 4722)
    query.obs().concat().to_pandas()
    query.X(layer_name="data").tables().concat().to_pandas()
    query.to_anndata(X_name="data")

This should produce no output and raise no exceptions. Actual behavior in 1.15.0, which is a regression from 1.14.5:

Traceback (most recent call last):
  File "/home/ubuntu/git/single-cell-data/TileDB-SOMA/x.py", line 35, in <module>
    with tiledbsoma.ExperimentAxisQuery(
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: ExperimentAxisQuery() takes no arguments

Changes:

• Since on [python] Ingest somacore classes #3307 we moved the impl from somacore to tiledbsoma._query, have tiledbsoma re-export the impl from where it is now located
• Update our unit-test logic to use the same API as exposed to users, namely, tiledbsoma.ExperimentAxisQuery

Notes for Reviewer:

[sc-59686]

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.32%. Comparing base (bda7d97) to head (6ae4ac1).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3476      +/-   ##
==========================================
+ Coverage   86.27%   86.32%   +0.04%     
==========================================
  Files          55       55              
  Lines        6339     6339              
==========================================
+ Hits         5469     5472       +3     
+ Misses        870      867       -3     

Flag	Coverage Δ
python	86.32% <100.00%> (+0.04%)	⬆️

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Components	Coverage Δ
python_api	86.32% <100.00%> (+0.04%)	⬆️
libtiledbsoma	∅ <ø> (∅)

[bkmartinjr]

two nits. no concern with intention of the PR, so pre-approving on the assumption the nits are easy to fix