fix: pybabel extract fails

[hushaoqing]

SUMMARY

fix #16613

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

ADDITIONAL INFORMATION

• Has associated issue: "pybabel extract" gives "NameError: name 'SQLLAB_TIMEOUT' is not defined" #16613
• 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

Merging #16629 (b4d748c) into master (6465ee7) will decrease coverage by 0.16%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #16629      +/-   ##
==========================================
- Coverage   76.70%   76.54%   -0.17%     
==========================================
  Files        1004     1003       -1     
  Lines       53983    53975       -8     
  Branches     7335     7330       -5     
==========================================
- Hits        41408    41315      -93     
- Misses      12336    12421      +85     
  Partials      239      239              

Flag	Coverage Δ
hive	?
mysql	81.55% <ø> (-0.04%)	⬇️
postgres	81.58% <ø> (-0.04%)	⬇️
python	81.66% <ø> (-0.32%)	⬇️
sqlite	81.22% <ø> (-0.04%)	⬇️

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

Impacted Files	Coverage Δ
superset/sql_lab.py	80.70% <ø> (ø)
superset/db_engines/hive.py	0.00% <0.00%> (-82.15%)	⬇️
superset/db_engine_specs/hive.py	69.80% <0.00%> (-16.87%)	⬇️
superset/utils/date_parser.py	93.17% <0.00%> (-3.42%)	⬇️
superset/common/query_context.py	88.88% <0.00%> (-1.86%)	⬇️
superset/views/database/mixins.py	81.03% <0.00%> (-1.73%)	⬇️
superset/db_engine_specs/presto.py	83.47% <0.00%> (-1.05%)	⬇️
...ontrols/DndColumnSelectControl/DndMetricSelect.tsx	41.40% <0.00%> (-0.48%)	⬇️
superset/db_engine_specs/base.py	88.00% <0.00%> (-0.39%)	⬇️
superset/connectors/sqla/models.py	88.04% <0.00%> (-0.24%)	⬇️
... and 4 more

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[villebro]

Thanks for the fix!