fix: remove whitespace from http_path for databricks

[eschutho]

SUMMARY

The databricks connector driver will error if there's a space in the http_path. Fixing this at the db engine spec level to catch at the lowest level. The ui for the database connection modal already strips on the client side, so adding an extra layer here for api handling.

TESTING INSTRUCTIONS

Curl the api with a trailing string in the http_path field for either validate/edit/or db connection. The connection should work regardless of any leading/trailing whitespace.

ADDITIONAL INFORMATION

• Has associated issue:
• 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 #22671 (2a0c84d) into master (71982ee) will increase coverage by 0.16%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master   #22671      +/-   ##
==========================================
+ Coverage   66.91%   67.08%   +0.16%     
==========================================
  Files        1850     1865      +15     
  Lines       70695    71387     +692     
  Branches     7750     7750              
==========================================
+ Hits        47309    47889     +580     
- Misses      21370    21482     +112     
  Partials     2016     2016              

Flag	Coverage Δ
hive	52.60% <0.00%> (+0.13%)	⬆️
mysql	78.01% <50.00%> (+0.02%)	⬆️
postgres	78.08% <50.00%> (+0.02%)	⬆️
presto	52.49% <0.00%> (+0.12%)	⬆️
python	81.32% <100.00%> (+0.05%)	⬆️
sqlite	76.48% <50.00%> (-0.05%)	⬇️
unit	51.48% <100.00%> (+0.52%)	⬆️

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

Impacted Files	Coverage Δ
superset/db_engine_specs/databricks.py	66.19% <100.00%> (+0.48%)	⬆️
superset/db_engine_specs/impala.py	44.87% <0.00%> (-38.47%)	⬇️
superset/db_engine_specs/bigquery.py	69.60% <0.00%> (-12.09%)	⬇️
superset/dashboards/filter_state/commands/utils.py	80.00% <0.00%> (-10.00%)	⬇️
...uperset/dashboards/filter_state/commands/delete.py	91.30% <0.00%> (-4.35%)	⬇️
superset/databases/commands/update.py	75.86% <0.00%> (-4.14%)	⬇️
...uperset/dashboards/filter_state/commands/update.py	96.66% <0.00%> (-3.34%)	⬇️
superset/views/datasource/schemas.py	97.22% <0.00%> (-2.78%)	⬇️
superset/dao/base.py	92.78% <0.00%> (-2.62%)	⬇️
superset/examples/birth_names.py	70.00% <0.00%> (-1.43%)	⬇️
... and 51 more

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