Upgrade to Testcontainers 2.0.0

[marcphilipp]

Testcontainers 2.0 deprecated org.testcontainers.containers.PostgreSQLContainer in favor of org.testcontainers.postgresql.PostgreSQLContainer. However, when replacing it in a @ServiceConnection bean, no R2DBC connection factory is discovered.

[wilkinsona]

We don't support Testcontainers 2.0 at all yet. We can use this issue to track that as adapting to the deprecation of org.testcontainers.containers.PostgreSQLContainer will be a part of the upgrade.

[marcphilipp]

FWIW 2.0 works for me when using the deprecated implementation class

[eddumelendez]

I am working on this rn, will submit a PR tomorrow.

[snicoll]

Gah, I missed that and started to work on it. @eddumelendez happy to review the PR then!

[snicoll]

Closing in favor of PR #47664