Refactor mod-file-related FileMetric

[jt2594838]

Mod-file-related FileMetrics are managed within the Modification to ease the management and reduce potential bugs.

[Pengzna]

LGTM~

[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

Attention: Patch coverage is 96.10390% with 3 lines in your changes missing coverage. Please review.

Project coverage is 39.62%. Comparing base (34228a9) to head (720699e).
Report is 9 commits behind head on master.

Files with missing lines	Patch %	Lines
.../iotdb/db/storageengine/dataregion/DataRegion.java	33.33%	2 Missing ⚠️
...gine/dataregion/modification/ModificationFile.java	93.75%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #14199      +/-   ##
============================================
+ Coverage     39.61%   39.62%   +0.01%     
  Complexity       71       71              
============================================
  Files          4232     4233       +1     
  Lines        269671   270007     +336     
  Branches      32689    32746      +57     
============================================
+ Hits         106837   107003     +166     
- Misses       162834   163004     +170     

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