style(test): Unify the indentation format of SQL strings in clickhouse_test

[CCpro10]

原来的测试中的SQL语句可读性太差，有的没有缩进，贴着左边，有的又缩进了三个tab。
The SQL statements in the original test were not readable .

我统一了缩进格式。
I unified the indentation format.

[codecov-commenter]

Codecov Report

Base: 76.97% // Head: 76.97% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (97d9d9e) compared to base (b000aa3).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2277   +/-   ##
=======================================
  Coverage   76.97%   76.97%           
=======================================
  Files         583      583           
  Lines       48446    48446           
=======================================
+ Hits        37291    37292    +1     
  Misses       9135     9135           
+ Partials     2020     2019    -1     

Flag	Coverage Δ
go-1.15-386	76.96% <ø> (-0.03%)	⬇️
go-1.15-amd64	76.97% <ø> (+<0.01%)	⬆️
go-1.16-386	76.97% <ø> (-0.02%)	⬇️
go-1.16-amd64	77.00% <ø> (+0.02%)	⬆️
go-1.17-386	77.01% <ø> (+0.01%)	⬆️
go-1.17-amd64	76.99% <ø> (+<0.01%)	⬆️
go-1.18-386	76.91% <ø> (-0.01%)	⬇️
go-1.18-amd64	76.92% <ø> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
os/gcron/gcron_schedule_fix.go	87.50% <0.00%> (-12.50%)	⬇️
os/gcache/gcache_adapter_memory_lru.go	97.82% <0.00%> (+8.69%)	⬆️

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