Expose RDMA device name in the devicespec if available

[almaslennikov]

The DeviceInfoSpec allows to specify rdma device for a pci device: https://github.com/k8snetworkplumbingwg/network-attachment-definition-client/blob/master/pkg/apis/k8s.cni.cncf.io/v1/types.go#L63

Multus propagates device spec to the network-status, so it's easy to track which RDMA device is allocated to a POD:

k8s.v1.cni.cncf.io/network-status:
	[{
		"name": "k8s-pod-network",
		"ips": [
			"192.168.107.206"
		],
		"default": true,
		"dns": {}
	},{
		"name": "default/sriov-net1",
		"interface": "net1",
		"ips": [
			"10.56.217.2"
		],
		"mac": "7a:bb:87:d9:b4:94",
		"dns": {},
		"device-info": {
			"type": "pci",
			"version": "1.1.0",
			"pci": {
				"pci-address": "0000:03:00.3",
				"rdma-device": "mlx5_4"
			}
		},
		"gateway": [
			"\u003cnil\u003e"
		]
	}]

This change can serve two purposes:

1. Simplify debugging. Users can just query pod's network status and understand which RDMA device belongs to which network
2. Allow applications in multi-network pods to understand, which RDMA device they should use.

[coveralls]

Pull Request Test Coverage Report for Build 8084092568

Details

• -1 of 8 (87.5%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.03%) to 75.192%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/netdevice/netResourcePool.go	7	8	87.5%

Totals
Change from base Build 8082319142:	0.03%
Covered Lines:	2058
Relevant Lines:	2737

---

💛 - Coveralls

[almaslennikov]

/retest

[adrianchiris]

@SchSeba PTAL

[Eoghan1232]

lgtm

[almaslennikov]

/retest

[SchSeba]

LGTM