Fix instrumentation of SQLAlchemy when using sqlalchemy.engine_from_config

[moredip]

Description

Fixes a bug where SQLAlchemy engines created via sqlalchemy.engine_from_config(...) are not instrumented by SQLAlchemyInstrumentor.

sqlalchemy.engine_from_config(...) directly calls create_engine(...) imported from sqlalchemy.engine.create. If we don't wrap that copy of the create_engine method then engines created via engine_from_config are not instrumented.

Type of change

Please delete options that are not relevant.

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

How Has This Been Tested?

• Added a unit test
• ran it and checked that it failed
• made the fix
• verified that the test now passes

Does This PR Require a Core Repo Change?

• [ ] Yes. - Link to PR:
• [x] No.

Checklist:

See contributing.md for styleguide, changelog guidelines, and more.

• [x] Followed the style guidelines of this project
• [x] Changelogs have been updated
• [x] Unit tests have been added
• [ ] Documentation has been updated