fix: pooled connections created with stale credentials

[karenc-bq]

Description

Wrapper caches the connection creation function, causing pooled connections to always be populated with the initial connection properties.
This impacts long running applications using temporary credentials, as new pooled connections created with stale credentials will fail. This PR updates the pooled connection provider's connect method to use the latest DSN when creating connections.

Testing

• integration test run

Additional Reviewers

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[DerbySoft-GYB]

Hi @sophia-bq, @karenc-bq

While this PR addresses the stale credentials, could a more flexible architectural approach be adopted to solve such issues, such as a driver chain like: AWS Wrapper Driver -> Credentials Wrapper Driver -> Physical MySQL Driver?

Specifically, could the UnderlyingDriver in the mysql-driver implementation be made injectable or configurable? This would allow users to provide a Credentials Wrapper Driver to implement specialized credential logic requirements. Currently, because the physical driver is hardcoded, users who need custom logic must maintain their own full wrapper implementations, which increases maintenance overhead whenever the internal interfaces of the wrapper evolve.

What do you think about this direction for future extensibility?