HBase cannot load ClientRpcControllerFactory when adding connector with the --jar option to Spark

I have noticed this today when working with the shaded spark connector jar:

23/12/01 06:01:34 WARN ipc.RpcControllerFactory: Cannot load configured "hbase.rpc.controllerfactory.class" (org.apache.hadoop.hbase.ipc.controller.ClientRpcControllerFactory) from hbase-site.xml, falling back to use default RpcControllerFactory

We should be able to avoid this by not relocating these classes at all.
This is only a problem for shaded artifacts that do not include HBase, like the shaded connectors and the planned phoenix-client-byo-hbase variant.
In the full-fat shaded clients phoenix and HBase has the same shading, and HBase is able to find the shaded class.