bugfix: fix dameng delete undo fail

[caohdgege]

• I have registered the PR changes.

Ⅰ. Describe what this PR did

same with SqlServerUndoDeleteExecutor，run set IDENTITY_INSERT around actual undo sql

Ⅱ. Does this pull request fix one issue?

fixes #6713

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

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 50.24%. Comparing base (939655a) to head (c57ac34).

Files	Patch %	Lines
...ta/rm/datasource/undo/dm/DmUndoDeleteExecutor.java	0.00%	4 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x    #6714      +/-   ##
============================================
- Coverage     50.25%   50.24%   -0.01%     
  Complexity     5854     5854              
============================================
  Files          1058     1058              
  Lines         36704    36707       +3     
  Branches       4364     4366       +2     
============================================
- Hits          18444    18442       -2     
- Misses        16427    16431       +4     
- Partials       1833     1834       +1     

Files	Coverage Δ
...ta/rm/datasource/undo/dm/DmUndoDeleteExecutor.java	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes

[funky-eyes]

LGTM