test: Add tests for fixed open issues

[lukemanley]

Tests added for open issues that appear to be fixed:

closes #15474
closes #15425
closes #14863
closes #10869

These issues appear to be fixed and tested (noting tests in order to close):

closes #19754 - test_join.py::test_join_on_struct
closes #17411 - test_list.py::test_list_arr_get
closes #14424 - test_sort.py::test_expr_sort_by_multi_nulls_last
closes #12530 - test_interop.py::test_df_pycapsule_interface
closes #7038 - test_csv.py::test_error_message

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.88%. Comparing base (0654544) to head (b715c71).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #21185   +/-   ##
=======================================
  Coverage   79.88%   79.88%           
=======================================
  Files        1593     1593           
  Lines      227754   227754           
  Branches     2600     2600           
=======================================
+ Hits       181937   181947   +10     
+ Misses      45220    45210   -10     
  Partials      597      597           

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