Hibernate Extension: Check the error message when multiple JDBC Driver

[lucamolteni]

Description

See #44473 (comment)

Affected tests:

EntitiesInDefaultPUWithImplicitDatasourceConfigUrlMissingTest
EntitiesInDefaultPUWithExplicitDatasourceMissingTest

After #44473 I found out that to get this error message, we need to have both JDBC drivers, when including only pgsql the error message is different. Investigate why

Implementation ideas

See

        Optional<String> dbKindOptional = DefaultDataSourceDbKindBuildItem.resolve(
                defaultDataSourceBuildTimeConfig.dbKind(),
                defaultDataSourceDbKindBuildItems,
                defaultDataSourceBuildTimeConfig.devservices().enabled()
                        .orElse(!dataSourcesBuildTimeConfig.hasNamedDataSources()),
                curateOutcomeBuildItem);

[quarkus-bot]

/cc @barreiro (jdbc), @gsmet (hibernate-orm)