[python] Add type checks to obsm, obsp, varm and varp early in ingestion

[XanthosXanthopoulos]

Issue and/or context:
closes #2118

Changes:
Adds explicit type checks to from_anndata for obsm, obsp, varm and varp before the actual ingestion start to catch the case where a DataFrame is passed.

Notes for Reviewer:

[codecov]

Codecov Report

Merging #2131 (1bf36de) into main (fae2ac1) will increase coverage by 12.73%.
Report is 4 commits behind head on main.
The diff coverage is 61.53%.

❗ Current head 1bf36de differs from pull request most recent head ac10e71. Consider uploading reports for the commit ac10e71 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2131       +/-   ##
===========================================
+ Coverage   78.52%   91.25%   +12.73%     
===========================================
  Files         136       35      -101     
  Lines       10759     3807     -6952     
  Branches      209        0      -209     
===========================================
- Hits         8448     3474     -4974     
+ Misses       2211      333     -1878     
+ Partials      100        0      -100     

Flag	Coverage Δ
libtiledbsoma	?
python	91.25% <61.53%> (+0.51%)	⬆️
r	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
python_api	91.25% <61.53%> (+0.51%)	⬆️
libtiledbsoma	∅ <ø> (∅)

[johnkerl]

@XanthosXanthopoulos thanks for working on this! :)

Let's also add a unit-test case

• In apis/python/tests/test_basic_anndata_io.py
• You can get adata
• Make a bdata with bdata = ad.AnnData(X=adata.X, obs=adata.obs, var=adata.var, obsm={"testing": adata.obs}) -- this will result in a dataframe being in an obsm slot
• Wrap a from_anndata call in with pytest.raises(TypeError)
• Assert the destination SOMA URI doesn't exist at all (i.e. there was no partial write)

[johnkerl]

Users will expect obsm not Obsm -- same for the other three

[johnkerl]

🚢 Thanks @XanthosXanthopoulos !!! 🚢

[johnkerl]

@XanthosXanthopoulos please feel free to self-merge once CI is green

[github-actions]

The backport to release-1.7 failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-release-1.7 release-1.7
# Navigate to the new working tree
cd .worktrees/backport-release-1.7
# Create a new branch
git switch --create backport-2131-to-release-1.7
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick --mainline 1 ef6cb19ef8dd159db08d602acdb68409da51cdee
# Push it to GitHub
git push --set-upstream origin backport-2131-to-release-1.7
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-release-1.7

Then, create a pull request where the base branch is release-1.7 and the compare/head branch is backport-2131-to-release-1.7.