RDMA/irdma: Introduce GEN3 vPort driver support

In the IPU model, a function can host one or more logical network
endpoints called vPorts. Each vPort may be associated with either a
physical or an internal communication port, and can be RDMA capable. A
vPort features a netdev and, if RDMA capable, must have an associated
ib_dev.

This change introduces a GEN3 auxiliary vPort driver responsible for
registering a verbs device for every RDMA-capable vPort. Additionally,
the UAPI is updated to prevent the binding of GEN3 devices to older
user-space providers.

Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Link: https://patch.msgid.link/20250827152545.2056-8-tatyana.e.nikolova@intel.com
Tested-by: Jacob Moroni <jmoroni@google.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>

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