chore(sqlalchemy): import from correct path

[villebro]

SUMMARY

While doing some unrelated work I noticed that some SQLAlchemy exceptions have moved from sqlalchemy.orm.exc to sqlalchemy.exc as of 1.4, namely NoResultFound and MultipleResultsFound:

See https://docs.sqlalchemy.org/en/20/core/exceptions.html for the docs.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

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

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (04f1c35) 69.18% compared to head (fa56178) 69.18%.

Files	Patch %	Lines
superset/commands/importers/v1/examples.py	0.00%	1 Missing ⚠️
superset/views/base_schemas.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #26301      +/-   ##
==========================================
- Coverage   69.18%   69.18%   -0.01%     
==========================================
  Files        1945     1945              
  Lines       75967    75966       -1     
  Branches     8466     8466              
==========================================
- Hits        52556    52555       -1     
  Misses      21224    21224              
  Partials     2187     2187              

Flag	Coverage Δ
hive	53.67% <66.66%> (-0.01%)	⬇️
mysql	78.08% <66.66%> (-0.01%)	⬇️
postgres	78.18% <66.66%> (-0.01%)	⬇️
presto	53.62% <66.66%> (-0.01%)	⬇️
python	82.86% <66.66%> (-0.01%)	⬇️
sqlite	76.83% <66.66%> (-0.01%)	⬇️
unit	55.79% <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.