Pipe: Fixed the bug that Disruptor may not clear the reference & will wait long time after pipe close

[Caideyipi]

Description

Before this PR, an empty realtime pipe may consume lots of time to close. The PR has checked the circumstance, where the pipe can be directly dropped now.

---

This PR has:

• been self-reviewed.
  • concurrent read
  • concurrent write
  • concurrent read and write
• added documentation for new or modified features or behaviors.
• added Javadocs for most classes and all non-trivial methods.
• added or updated version, license, or notice information
• added comments explaining the "why" and the intent of the code wherever would not be obvious
  for an unfamiliar reader.
• added unit tests or modified existing tests to cover new code paths, ensuring the threshold
  for code coverage.
• added integration tests.
• been tested in a test IoTDB cluster.

---

Key changed/added classes (or packages if there are too many classes) in this PR

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

❌ Patch coverage is 85.10638% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 39.84%. Comparing base (859c719) to head (6d591e9).
⚠️ Report is 7 commits behind head on master.

Files with missing lines	Patch %	Lines
...region/realtime/disruptor/BatchEventProcessor.java	82.14%	5 Missing ⚠️
...ource/dataregion/realtime/disruptor/Disruptor.java	66.66%	1 Missing ⚠️
...altime/listener/PipeInsertionDataNodeListener.java	93.33%	1 Missing ⚠️

Additional details and impacted files

@@ Coverage Diff @@## master #17549 +/- ##
=========================================
Coverage 39.83% 39.84% Complexity 2539 2539 =========================================
Files 5171 5171 Lines 348095 348123 +28 Branches 44474 44480 +6 =========================================
+ Hits 138677 138710 +33 + Misses 209418 209413 -5 

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[jt2594838]

source？