feat: adding delete_all_docs to Qdrant document store

[davidsbatista]

Related Issues

• fixes #2310

Proposed Changes:

• adds a new delete_all_documents() along with its asynchronous counterpart
• includes both simple deletion and index recreation modes
• minimal improvements, missing docstrings, methods converted to static and being called statically

How did you test it?

• unit tests, integration tests, manual verification
• added new tests:
  • test_delete_all_documents_no_index_recreation(): Verifies simple deletion functionality
  • test_delete_all_documents_index_recreation(): Tests index recreation with configuration preservation
  • test_delete_all_documents_async_no_index_recreation(): Async version of simple deletion test
  • test_delete_all_documents_async_index_recreation(): Async version of index recreation test

Checklist

• I have read the contributors guidelines and the code of conduct
• I have updated the related issue with new insights and changes
• I added unit tests and updated the docstrings
• I've used one of the conventional commit types for my PR title: fix:, feat:, build:, chore:, ci:, docs:, style:, refactor:, perf:, test:.