Add hasNoSlots() method to RedisClusterNode

[wmxl]

Closes #3014

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Pull Request: Add hasNoSlots() Method to RedisClusterNode

Feature Request:

This pull request addresses feature request #3014 and is related to the bug report #2769.

Problem:

Currently, checking if a RedisClusterNode has no assigned slots involves accessing the private slots field or using getSlots(), which generates unnecessary objects and adds overhead.

Solution:

This PR introduces a new method, hasNoSlots(), in the RedisClusterNode class. This method encapsulates the logic for checking if the slots field is either null or empty, improving performance and code readability.

Changes:

•	Added the method public boolean hasNoSlots() to the RedisClusterNode class.
•	Added unit tests to validate the behavior of this method.

Testing:

•	All existing tests pass.
•	New unit tests were added to ensure correct behavior when:
•	Slots are null.
•	Slots are empty.
•	Slots are assigned.

[tishun]

Seems like a good improvement, I have no comments.

BTW if you'd like you can add yourself to the list of authors at line 48

[tishun]

Oh, yes, you also need to ensure your code is properly formatted:

mvn formatter:format

[wmxl]

Oh, yes, you also need to ensure your code is properly formatted:

mvn formatter:format

Sorry about that! I’ve fixed the formatting and pushed the changes.