Fixing sync BlockingConnectionPool's disconnect method to follow the definition in ConnectionPoolInterface

[petyaslavova]

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Description of change

Fixes #3366

[Copilot]

Pull Request Overview

This PR fixes the BlockingConnectionPool.disconnect() method to align with the ConnectionPoolInterface definition by adding an inuse_connections parameter. The change allows selective disconnection of either all connections or only free connections in the pool.

• Adds inuse_connections parameter to BlockingConnectionPool.disconnect() method
• Updates test infrastructure with connection state tracking
• Adds comprehensive test coverage for both sync and async connection pool disconnect behavior

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
redis/connection.py	Modified BlockingConnectionPool.disconnect() to accept inuse_connections parameter and conditionally disconnect connections based on this flag
tests/test_connection_pool.py	Enhanced DummyConnection with socket state tracking and added test_pool_disconnect tests for both standard and blocking connection pools
tests/test_asyncio/test_connection_pool.py	Updated async DummyConnection with connection state tracking, renamed existing test, and added comprehensive disconnect tests

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