Upgrade sqlalchemy to 1.1.15

[fabaff]

Description:

• Changelog: http://docs.sqlalchemy.org/en/latest/changelog/changelog_11.html#change-1.1.15

Checklist:

If the code communicates with devices, web services, or third-party tools:

• Local tests with tox run successfully. Your PR cannot be merged unless tests pass
• New dependencies have been added to the REQUIREMENTS variable ([example][ex-requir]).
• New dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.

If the code does not interact with devices:

• Local tests with tox run successfully. Your PR cannot be merged unless tests pass