[ISSUE #10031] Add PreprocessHandler interface in AllocateMappedFileService

[guyinyou]

Change-Id: I4e81916a79f89c095ffb7b860c8ccd49e88c76ea

Which Issue(s) This PR Fixes

Fixes #10031

Brief Description

How Did You Test This Change?

[codecov-commenter]

Codecov Report

❌ Patch coverage is 12.50000% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 48.88%. Comparing base (36adf12) to head (6bba306).

Files with missing lines	Patch %	Lines
...ache/rocketmq/store/AllocateMappedFileService.java	12.50%	6 Missing and 1 partial ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop   #10032      +/-   ##
=============================================
- Coverage      48.96%   48.88%   -0.08%     
+ Complexity     13353    13331      -22     
=============================================
  Files           1373     1373              
  Lines          99701    99709       +8     
  Branches       12889    12890       +1     
=============================================
- Hits           48814    48741      -73     
- Misses         44980    45051      +71     
- Partials        5907     5917      +10     

☔ 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.