Update SQLAlchemy integration tutorial to remove sqlalchemy.MetaData.bind's usage

[duynhaaa]

The concept of "bound metadata" is deprecated in SQLAlchemy 1.4 and removed in 2.0, which means that the MetaData.bind no longer exists and its usage should be removed.

References:

• https://docs.sqlalchemy.org/en/14/changelog/migration_20.html#implicit-and-connectionless-execution-bound-metadata-removed
• deprecate metadata.bind, function.bind, e.g. all occurrences of ".bind" sqlalchemy/sqlalchemy#4634
• https://gerrit.sqlalchemy.org/c/sqlalchemy/sqlalchemy/+/2302

[duynhaaa]

I don't know if there is any remnant elsewhere with in the documentation but will create follow-up PRs if found.

[mmerickel]

Can you please send PRs against main instead of 2.0-branch. Thanks!

[duynhaaa]

Can you please send PRs against main instead of 2.0-branch. Thanks!

@mmerickel I just updated. Thanks for letting me know.

[digitalresistor]

Thank you!