[python] Replace TileDBObject with SOMAObject; Remove tiledb.TileDBError usage 4/5

[nguyenv]

Issue and/or context:

This is on top of #2735

Changes:

• Replace TileDBObject with SOMAObject; and _tiledb_object with _soma_object
• Remove tiledb.TileDBError usage

[codecov]

Codecov Report

Attention: Patch coverage is 96.77419% with 1 line in your changes missing coverage. Please review.

Project coverage is 89.84%. Comparing base (105cfe5) to head (e944c0b).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2736      +/-   ##
==========================================
+ Coverage   89.32%   89.84%   +0.52%     
==========================================
  Files          37       37              
  Lines        4037     3980      -57     
==========================================
- Hits         3606     3576      -30     
+ Misses        431      404      -27     

Flag	Coverage Δ
python	89.84% <96.77%> (+0.52%)	⬆️

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

Components	Coverage Δ
python_api	89.84% <96.77%> (+0.52%)	⬆️
libtiledbsoma	∅ <ø> (∅)