fix(database): retrival of tables and views from schema for exasol backend

[Nicoretti]

SUMMARY

Updates the dependencies of the exasol feature flag, to address #20105 which have been caused by a bug in the sqlalchemy-exasol dependency.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

Before

After

TESTING INSTRUCTIONS

1. Go to 'Datasets'
2. Click on '+ DATASET'
3. Select the Exasol DB as database
4. Select a schema containing views and tables
5. Try to select a Table/Schema
6. No Tables/Schemas are shown

For more details see #20105

ADDITIONAL INFORMATION

• Fixes Add dataset does not work for Exasol backend when using pydobc based sqlalchemy dialect #20105
• Has associated issue: Add dataset does not work for Exasol backend when using pydobc based sqlalchemy dialect #20105
• Required feature flags: exasol

[codecov]

Codecov Report

Merging #20127 (7aee3ee) into master (660af40) will decrease coverage by 0.16%.
The diff coverage is n/a.

❗ Current head 7aee3ee differs from pull request most recent head af37e6f. Consider uploading reports for the commit af37e6f to get more accurate results

@@            Coverage Diff             @@
##           master   #20127      +/-   ##
==========================================
- Coverage   66.47%   66.30%   -0.17%     
==========================================
  Files        1721     1721              
  Lines       64477    64477              
  Branches     6795     6795              
==========================================
- Hits        42858    42750     -108     
- Misses      19891    19999     +108     
  Partials     1728     1728              

Flag	Coverage Δ
hive	?
mysql	82.14% <ø> (ø)
postgres	82.20% <ø> (ø)
presto	?
python	82.28% <ø> (-0.35%)	⬇️
sqlite	81.94% <ø> (ø)
unit	?

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

Impacted Files	Coverage Δ
superset/db_engines/hive.py	0.00% <0.00%> (-85.19%)	⬇️
superset/db_engine_specs/hive.py	70.22% <0.00%> (-15.65%)	⬇️
superset/db_engine_specs/presto.py	83.36% <0.00%> (-5.34%)	⬇️
superset/connectors/sqla/models.py	88.39% <0.00%> (-1.19%)	⬇️
superset/initialization/__init__.py	91.13% <0.00%> (-0.36%)	⬇️
superset/db_engine_specs/base.py	88.08% <0.00%> (-0.34%)	⬇️
superset/models/core.py	88.91% <0.00%> (-0.25%)	⬇️
superset/utils/core.py	90.02% <0.00%> (-0.12%)	⬇️

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