Add string-based filter deletion alongside the Filter.Expression-based deletion
for Qdrant vector store, providing consistent deletion capabilities with
other vector store implementations.
Key changes:
- Add delete(Filter.Expression) implementation using Qdrant's filter API
- Leverage existing QdrantFilterExpressionConverter for filter translation
- Use Qdrant's native deleteAsync with filter capabilities
- Add comprehensive integration tests for filter deletion
- Support both simple and complex filter expressions
This maintains consistency with other vector store implementations while
utilizing Qdrant's native filtering capabilities for efficient metadata-based
deletion.
Signed-off-by: Soby Chacko <soby.chacko@broadcom.com>
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