Which Issue(s) This PR Fixes

Add cache for each client request broker end rebalancing in the pop consumption mode to avoid wasting computing resources of broker end due to repeated calculation of load balancing without changes. The effect is more obvious in theory when there are a large number of queues or consumers

Fixes #9123

Brief Description

To add caching for broker-end rebalancing under the pop consumption model, use ReentrantLock to maintain consistency and efficiency. Before performing load balancing calculations, attempt to obtain cache entries when the client list and messagequeue list remain unchanged. Only if the cache is not hit will the calculation logic be executed, using minimal space to avoid wasting broker computing resources and ensuring efficient rebalancing requests

How Did You Test This Change?

Ten consumers were registered for the test consumer group, and mock 15 queues were set up to test the correctness and performance of the broker-end doLoadBalance method under the test pop consumption mode. All QueryAssignmentProcessorTest (including the original 5 methods) passed, and the performance is as follows (in the local environment)