feat(sql router): add interface for sql to dag

[aceforeverd]

DAG SQLToDAG(const std::string& sql, hybridse::sdk::Status* status);

[codecov]

Codecov Report

Attention: 57 lines in your changes are missing coverage. Please review.

Comparison is base (a8c0226) 40.16% compared to head (d33c5d5) 74.90%.

Files	Patch %	Lines
src/sdk/sql_router.cc	0.00%	53 Missing ⚠️
...paradigm/openmldb/sdk/impl/SqlClusterExecutor.java	84.61%	1 Missing and 1 partial ⚠️
src/sdk/sql_router.h	0.00%	2 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##               main    #3630       +/-   ##
=============================================
+ Coverage     40.16%   74.90%   +34.74%     
- Complexity      640      644        +4     
=============================================
  Files           191      725      +534     
  Lines         11233   130840   +119607     
  Branches       1325     1327        +2     
=============================================
+ Hits           4512    98012    +93500     
- Misses         6428    32534    +26106     
- Partials        293      294        +1     

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