Add binding for MERGE clause

[andyfengHKU]

No description provided.

[codecov]

Codecov Report

Patch coverage: 78.12% and project coverage change: -0.16% ⚠️

Comparison is base (c1896a3) 91.30% compared to head (e0a9d8f) 91.15%.

❗ Current head e0a9d8f differs from pull request most recent head 598798c. Consider uploading reports for the commit 598798c to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1861      +/-   ##
==========================================
- Coverage   91.30%   91.15%   -0.16%     
==========================================
  Files         799      805       +6     
  Lines       28996    29120     +124     
==========================================
+ Hits        26475    26544      +69     
- Misses       2521     2576      +55     

Files Changed	Coverage Δ
src/binder/query/bound_merge_clause.cpp	0.00% <0.00%> (ø)
src/include/binder/binder.h	100.00% <ø> (ø)
.../binder/query/updating_clause/bound_merge_clause.h	0.00% <0.00%> (ø)
src/include/parser/expression/parsed_expression.h	81.25% <ø> (ø)
...clude/parser/query/updating_clause/create_clause.h	100.00% <ø> (ø)
...nclude/parser/query/updating_clause/merge_clause.h	0.00% <0.00%> (ø)
src/include/parser/transformer.h	100.00% <ø> (ø)
src/include/planner/query_planner.h	100.00% <ø> (ø)
src/parser/parsed_expression_visitor.cpp	89.18% <0.00%> (ø)
src/parser/transformer.cpp	95.00% <10.00%> (-1.32%)	⬇️
... and 16 more

... and 2 files with indirect coverage changes

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