Revert "Load: Parallelly load files into different target data partitions (#13893)"

[SteveYurongSu]

This reverts commit dbb99bc.

[sonarqubecloud]

Quality Gate passed

Issues
0 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 SonarCloud

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 12 lines in your changes missing coverage. Please review.

Project coverage is 39.79%. Comparing base (4e79200) to head (7d6c7cf).
Report is 7 commits behind head on master.

Files with missing lines	Patch %	Lines
...iotdb/db/storageengine/load/LoadTsFileManager.java	0.00%	12 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #13905      +/-   ##
============================================
- Coverage     39.79%   39.79%   -0.01%     
  Complexity       71       71              
============================================
  Files          4159     4159              
  Lines        263425   263414      -11     
  Branches      32083    32083              
============================================
- Hits         104818   104813       -5     
+ Misses       158607   158601       -6     

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