[ISSUE #9738] Remove macOS platform skip logic from test cases to improve cross-platform compatibility

[guyinyou]

• Remove Assume.assumeFalse(MixAll.isMac()) calls from test methods
• Remove macOS platform detection conditions in setUp/tearDown methods
• Update RocksdbTransferOffsetAndCqTest.notToBeExecuted() to return false
• Remove unused imports: org.junit.Assume and org.apache.rocketmq.common.MixAll
• Enable full test coverage on macOS platform

Affected modules:

• Broker config management tests (ConsumerOffsetManagerV2, SubscriptionGroupManagerV2, TopicConfigManagerV2)
• RocksDB related tests (LmqConsumerOffsetManager, OffsetSerializeWrapper, TransferOffsetAndCq)
• POP consumer tests (PopConsumerCache, PopConsumerRocksdbStore)
• Store layer tests (HAServer, CombineConsumeQueueStore, RocksDBConsumeQueueOffsetTable)
• Other component tests (CQType, ExportRocksDBConfigToJsonRequestHeader)

This change improves platform compatibility by ensuring all tests run on macOS instead of being skipped due to platform detection.

Change-Id: I59af05d0b1159107b6f1fbd10290d283f87e0e41
Co-developed-by: Cursor noreply@cursor.com

Which Issue(s) This PR Fixes

Fixes #9738

Brief Description

How Did You Test This Change?

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 48.16%. Comparing base (64999c1) to head (c08fe34).

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #9739      +/-   ##
=============================================
- Coverage      48.19%   48.16%   -0.03%     
+ Complexity     12168    12151      -17     
=============================================
  Files           1313     1313              
  Lines          93340    93340              
  Branches       11962    11962              
=============================================
- Hits           44988    44961      -27     
- Misses         42777    42804      +27     
  Partials        5575     5575              

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