In debezium-testing-testcontainers, we have a dependency to OkHttp; let's instead use the HTTP client coming with JDK 11+ (i.e. move the testcontainers module to Java 11 as baseline). The OkHttp dep causes friction for Quarkus users, as evidenced here, and our HTTP client usage should be that mundane, that no special client should be needed.

Note debezium-testing at large and all its submodules impacted by this.