Fixes #50140
In some use cases, Reactive SQL Client can be created programmatically (just injecting the Vert.x instance).
For these use cases, the Reactive SQL Client drivers must be registered.
Otherwise, after creating a native image, the program fails with a java.util.ServiceConfigurationError.
java.util.ServiceConfigurationError: No implementations of interface io.vertx.sqlclient.spi.Driver found that accept connection options io.vertx.pgclient.PgConnectOptions@f558ea18