test: document store tests

[ZanSara]

@masci

Related Issue(s):

• #2811
• #1996

Proposed changes:

• Refactor the base document store test suite following the model given by OpenSearch tests in #2691
• Refactor all document store suites to use this base class appropriately

Pre-flight checklist

• [X] I have read the contributors guidelines
• [X] If this is a code change, I added tests or updated existing ones
• ~If this is a code change, I updated the docstrings~