in sharding mode, support local transaction

[dk-lockdown]

ref: #236

Ⅰ. Describe what this PR did

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

Check the result, update rollbacked.

Ⅴ. Special notes for reviews

[codecov-commenter]

Codecov Report

Merging #255 (3a1754b) into dev (59b9ff1) will decrease coverage by 0.38%.
The diff coverage is 2.50%.

❗ Current head 3a1754b differs from pull request most recent head 77d9c3d. Consider uploading reports for the commit 77d9c3d to get more accurate results

@@            Coverage Diff             @@
##              dev     #255      +/-   ##
==========================================
- Coverage   43.77%   43.38%   -0.39%     
==========================================
  Files          82       82              
  Lines        9885     9980      +95     
==========================================
+ Hits         4327     4330       +3     
- Misses       5106     5196      +90     
- Partials      452      454       +2     

Impacted Files	Coverage Δ
pkg/executor/read_write_splitting.go	46.30% <0.00%> (-0.23%)	⬇️
pkg/plan/delete.go	6.55% <0.00%> (-0.72%)	⬇️
pkg/plan/insert.go	38.18% <0.00%> (-11.82%)	⬇️
pkg/plan/query.go	34.02% <0.00%> (-2.45%)	⬇️
pkg/plan/update.go	9.52% <0.00%> (-1.01%)	⬇️
pkg/executor/sharding.go	38.09% <7.69%> (-8.30%)	⬇️

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