feature: add fastjson2 undolog parser

[GoodBoyCoder]

• I have registered the PR changes.

Ⅰ. Describe what this PR did

add support for UndoLog serialization type of FastJson2

Ⅱ. Does this pull request fix one issue?

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Change the serialization configuration of undolog[undo.logSerialization] to fastjson2

Ⅴ. Special notes for reviews

[codecov]

Codecov Report

Attention: Patch coverage is 87.50000% with 1 line in your changes missing coverage. Please review.

Project coverage is 52.67%. Comparing base (5d2b139) to head (38a20cc).
Report is 1 commits behind head on 2.x.

Files with missing lines	Patch %	Lines
...datasource/undo/parser/Fastjson2UndoLogParser.java	87.50%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x    #6974      +/-   ##
============================================
+ Coverage     52.64%   52.67%   +0.02%     
- Complexity     6565     6571       +6     
============================================
  Files          1124     1125       +1     
  Lines         39915    39923       +8     
  Branches       4675     4677       +2     
============================================
+ Hits          21015    21029      +14     
+ Misses        16898    16893       -5     
+ Partials       2002     2001       -1     

Files with missing lines	Coverage Δ
...datasource/undo/parser/Fastjson2UndoLogParser.java	87.50% <87.50%> (ø)

... and 5 files with indirect coverage changes

[funky-eyes]

LGTM