start method of ClusterSharding throws an IllegalArgumentException in case there is no match between cluster node roles and the role specified in the ClusterShardingSettings passed to this method.
But it may be handy to have a method which will start a ShardRegion in proxy mode on nodes without this role (rather then just throwing an exception). Also this may allow to change role in ClusterShardingSettings without changing the application code.

This issue probably depends on #23472