Run queries twice to test for idempotence

[jparismorgan]

What

Adds tests for the idempotence of query() to address https://app.shortcut.com/tiledb-inc/story/32367/add-tests-for-query-idempotence. There is not much of a speed difference from repeating .query() twice, though I'm very open to other suggestions on how to test this. Alternatives include:

1. New separate idempotence tests in apis/python/test/test_index.py, i.e. test_flat_index_idempotence and test_ivf_flat_index_idempotence
2. New separate idempotence tests in apis/python/test/test_ingestion.py, i.e. test_flat_index_idempotence and test_ivf_flat_index_idempotence
3. New separate idempotence tests in apis/python/test/test_query.py, i.e. test_flat_index_idempotence and test_ivf_flat_index_idempotence
4. Move this logic into apis/python/test/test_ingestion.py and run the loop on the query() calls in there

Testing

Before:

(TileDB-Vector-Search) ~/repo/TileDB-Vector-Search/apis/python pytest test/test_index.py -s                                                  jparismorgan/query-idempotence 
============================================================================ test session starts ============================================================================
platform darwin -- Python 3.9.18, pytest-7.4.3, pluggy-1.3.0
rootdir: /Users/parismorgan/repo/TileDB-Vector-Search/apis/python
collected 2 items                                                                                                                                                           

test/test_index.py ..

============================================================================= 2 passed in 2.89s =============================================================================

After:

(TileDB-Vector-Search) ~/repo/TileDB-Vector-Search/apis/python pytest test/test_index.py -s                                                  jparismorgan/query-idempotence 
============================================================================ test session starts ============================================================================
platform darwin -- Python 3.9.18, pytest-7.4.3, pluggy-1.3.0
rootdir: /Users/parismorgan/repo/TileDB-Vector-Search/apis/python
collected 2 items                                                                                                                                                           

test/test_index.py ..

============================================================================= 2 passed in 3.07s =============================================================================

[NikolaosPapailiou]

Lets add a util function that runs x queries and asserts results to avoid duplication and make the code more readable.

[jparismorgan]

Thanks, updated:

(TileDB-Vector-Search) ~/repo/TileDB-Vector-Search/apis/python pytest test/test_index.py -s
================================================= test session starts =================================================
platform darwin -- Python 3.9.18, pytest-7.4.3, pluggy-1.3.0
rootdir: /Users/parismorgan/repo/TileDB-Vector-Search/apis/python
collected 2 items                                                                                                     

test/test_index.py ..

================================================== 2 passed in 3.33s ==================================================