Fixed the concurrency issue of region migrate and load

[Caideyipi]

Description

As the titles said.

---

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

[codecov]

Codecov Report

❌ Patch coverage is 60.39604% with 40 lines in your changes missing coverage. Please review.
✅ Project coverage is 38.78%. Comparing base (36154e5) to head (2c62ceb).
⚠️ Report is 13 commits behind head on master.

Files with missing lines	Patch %	Lines
.../iotdb/db/storageengine/dataregion/DataRegion.java	74.07%	14 Missing ⚠️
...tatemachine/dataregion/DataRegionStateMachine.java	0.00%	8 Missing ⚠️
...orageengine/dataregion/snapshot/SnapshotTaker.java	37.50%	5 Missing ⚠️
...iotdb/db/storageengine/load/LoadTsFileManager.java	0.00%	5 Missing ⚠️
...ngine/plan/scheduler/load/LoadTsFileScheduler.java	0.00%	3 Missing ⚠️
...g/apache/iotdb/db/storageengine/StorageEngine.java	57.14%	3 Missing ⚠️
...ne/execution/fragment/FragmentInstanceContext.java	0.00%	1 Missing ⚠️
.../execution/fragment/FragmentInstanceExecution.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #16796      +/-   ##
============================================
+ Coverage     38.72%   38.78%   +0.06%     
  Complexity      207      207              
============================================
  Files          5006     5006              
  Lines        332048   332126      +78     
  Branches      42227    42233       +6     
============================================
+ Hits         128577   128819     +242     
+ Misses       203471   203307     -164     

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[sonarqubecloud]

Quality Gate passed

Issues
13 New issues
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