Allow cluster wide scan with not fully covered cluster

[avifenesh]

This pull request includes several changes to the glide-core/redis-rs/redis module, primarily focusing on refactoring and improving the cluster_scan functionality. The most important changes involve modifying the cluster_scan method, updating error handling, and enhancing test coverage.

Refactoring and improvements to cluster_scan:

• glide-core/redis-rs/redis/src/cluster_async/mod.rs: Removed the cluster_scan_with_pattern method and merged its functionality into the cluster_scan method, which now accepts a ClusterScanArgs struct containing all necessary arguments. [1] [2]
• glide-core/redis-rs/redis/src/commands/mod.rs: Added ClusterScanArgs to the list of public exports for the cluster-async feature. [1] [2]

Error handling improvements:

• glide-core/redis-rs/redis/src/cluster_async/mod.rs: Enhanced error messages in the map_err and unwrap_or_else closures to provide more context about the errors encountered during command execution. [1] [2]

Test coverage enhancements:

• glide-core/redis-rs/redis/tests/test_async_cluster_connections_logic.rs: Updated test cases to include the az field in ConnectionDetails and ensure comprehensive testing of connection logic. [1] [2] [3] [4] [5] [6]
• glide-core/redis-rs/redis/tests/test_cluster_scan.rs: Modified the test_async_cluster_scan and test_async_cluster_scan_with_migration tests to use the TestClusterContext::new_with_cluster_client_builder method and the updated cluster_scan method with ClusterScanArgs. [1] [2] [3] [4]

These changes collectively improve the maintainability, error handling, and test coverage of the cluster_scan functionality in the glide-core/redis-rs/redis module.

Issue link

This Pull Request is linked to issue #2436

Checklist

Before submitting the PR make sure the following are checked:

• [x] This Pull Request is related to one issue.
• [x] Commit message has a detailed description of what changed and why.
• [x] Tests are added or updated.
• [ ] CHANGELOG.md and documentation files are updated.
• [x] Destination branch is correct - main or release
• [x] Commits will be squashed upon merging.

[Yury-Fridlyand]

I propose to split into multipe PRs - for core and per-client changes to avoid troubles like we had with another feature

[avifenesh]

I propose to split into multipe PRs - for core and per-client changes to avoid troubles like we had with another feature

Will do core+python for full integration prof, will move node to another.

Note that the changes to binding are almost not existent, mainly tests.