fix(databend): databend time grain expression

[hantmac]

SUMMARY

Fix the time_grain_expression in databend.

Fixes #26360

TESTING INSTRUCTIONS

Create databend database -> create dataset -> edit chart -> select timestamp field -> select Time Grain. There are time grain options to be selected.

ADDITIONAL INFORMATION

• Has associated issue: [Databend datasource] Can't get TIME GRAIN when create chart on dataset #26360
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (b6d433d) 69.17% compared to head (656afdf) 69.17%.
Report is 5 commits behind head on master.

Files	Patch %	Lines
superset/db_engine_specs/databend.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #26378      +/-   ##
==========================================
- Coverage   69.17%   69.17%   -0.01%     
==========================================
  Files        1945     1945              
  Lines       75979    75982       +3     
  Branches     8476     8476              
==========================================
+ Hits        52562    52564       +2     
- Misses      21227    21228       +1     
  Partials     2190     2190              

Flag	Coverage Δ
hive	53.68% <33.33%> (-0.01%)	⬇️
mysql	78.07% <33.33%> (-0.01%)	⬇️
postgres	78.17% <33.33%> (-0.01%)	⬇️
presto	53.63% <33.33%> (-0.01%)	⬇️
python	82.85% <66.66%> (-0.01%)	⬇️
sqlite	76.83% <33.33%> (-0.01%)	⬇️
unit	55.80% <66.66%> (+<0.01%)	⬆️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[michael-s-molina]

LGTM