[ISSUE #10383] Fix flaky store and proxy tests

[RongtongJin]

Summary

This is a follow-up for the tests called out around #10404 and the broader #10383 test stability/dependency work. It keeps the tests enabled and makes the repeated-run behavior deterministic instead of quarantining them.

• Use dynamic HA ports in AutoSwitchHATest and pass the actual bound HA address after startup.
• Wait for HA replication connection establishment before producing messages after master/slave role changes.
• Avoid double shutdown/destroy in AutoSwitchHATest teardown paths to prevent repeated-run file lock noise.
• Use dynamically allocated DLedger ports (localhost:0 for single-node tests, available ephemeral ports for two-node tests) instead of the shared nextPort() sequence.
• Make ReceiptHandleProcessorTest deterministic by setting the mocked channel online before the renewal scheduler starts, returning a completed renewal future, and shutting down the processor in teardown.

Validation

• Reproduced AutoSwitchHATest#testAddBroker failure with 127.0.0.1:10912 pre-bound; it failed before the change and passed after the dynamic-port fix.
• mvn -q -pl store -am -DskipITs -DfailIfNoTests=false -Dcheckstyle.skip=true -Dspotbugs.skip=true -Dtest=AutoSwitchHATest#testConfirmOffset test passed 3 consecutive runs.
• mvn -q -pl store -am -DskipITs -DfailIfNoTests=false -Dcheckstyle.skip=true -Dspotbugs.skip=true -Dtest=AutoSwitchHATest,DLedgerCommitlogTest,DLedgerMultiPathTest test passed 100 total runs; each run reported Tests run: 12, Failures: 0, Errors: 0, Skipped: 3 on this macOS environment, with no ConditionTimeoutException, BindException, release file lock error, ClassNotFoundException, or forked VM failure in the accepted logs.
• mvn -q -pl store -am -DskipITs -DfailIfNoTests=false -Dcheckstyle.skip=true -Dspotbugs.skip=true -Dtest=DLedgerCommitlogTest,DLedgerMultiPathTest test passed on this macOS environment with the existing platform assumptions (Tests run: 2, Failures: 0, Errors: 0, Skipped: 2).
• mvn -q -pl proxy -am -DskipITs -DfailIfNoTests=false -Dcheckstyle.skip=true -Dspotbugs.skip=true -Dtest=ReceiptHandleProcessorTest test passed 100 consecutive independent Maven runs, with no Argument(s) are different, NullPointerException, or Mockito strict stubbing error in the logs.
• mvn -q -pl store -am -DskipITs -Dcheckstyle.skip=true -Dspotbugs.skip=true test-compile passed.

Bazel validation was not run locally because bazel is not installed in this environment (zsh: command not found: bazel).

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 47.92%. Comparing base (41a3a35) to head (e02728f).
⚠️ Report is 3 commits behind head on develop.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop   #10407      +/-   ##
=============================================
- Coverage      49.01%   47.92%   -1.09%     
+ Complexity     13485    13249     -236     
=============================================
  Files           1376     1376              
  Lines         100527   100536       +9     
  Branches       12983    12983              
=============================================
- Hits           49274    48184    -1090     
- Misses         45251    46410    +1159     
+ Partials        6002     5942      -60     

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