feat: support sql lookup template sql

[Yisaer]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 76.92308% with 3 lines in your changes missing coverage. Please review.

Project coverage is 71.14%. Comparing base (410f52d) to head (adc04c2).
Report is 12 commits behind head on master.

Files with missing lines	Patch %	Lines
extensions/impl/sql/lookupSource.go	76.92%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3398      +/-   ##
==========================================
+ Coverage   71.08%   71.14%   +0.05%     
==========================================
  Files         403      406       +3     
  Lines       46080    46427     +347     
==========================================
+ Hits        32754    33026     +272     
- Misses      10753    10811      +58     
- Partials     2573     2590      +17     

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