RDMA cannot be disabled

[e-minguez]

#666 (in fact #799) made a change on how RDMA is being managed with the operator. Basically it just allows to be "shared" or "exclusive". There are some scenarios that benefit of not having RDMA active, such as trying to reduce queues using 'ethtool -L {interface} combined "XX"' to avoid vector exhaustion. However the module complains as "ice XXX YY Cannot change channels when RDMA is active".
Disabling RDMA by blacklisting the module and disabling RDMA service then makes SRIOV checking for RDMA service and failing as:

2025-07-23T08:05:46.673817651Z ERROR daemon/writer.go:142 DiscoverRDMASubsystem(): failed to get RDMA subsystem mode {"error": "protocol not supported"}