add CNI bridge network provider #1965

Job	Run time
prepare	1s
test / prepare	3m 33s
test / run (containerd, ./frontend/dockerfile, integration)	5m 35s
test / run (containerd, ./frontend/dockerfile, dockerfile)	6m 13s
test / run (containerd-rootless, ./frontend/dockerfile, integration)	4m 46s
test / run (containerd-rootless, ./frontend/dockerfile, dockerfile)	5m 32s
test / run (containerd-1.6, ./frontend/dockerfile, integration)	4m 21s
test / run (containerd-1.6, ./frontend/dockerfile, dockerfile)	8m 26s
test / run (containerd-snapshotter-stargz, ./frontend/dockerfile, integration)	4m 44s
test / run (containerd-snapshotter-stargz, ./frontend/dockerfile, dockerfile)	6m 15s
test / run (oci, ./frontend/dockerfile, integration)	4m 46s
test / run (oci, ./frontend/dockerfile, dockerfile)	5m 43s
test / run (oci-rootless, ./frontend/dockerfile, integration)	3m 48s
test / run (oci-rootless, ./frontend/dockerfile, dockerfile)	4m 59s
test / run (oci-snapshotter-stargz, ./frontend/dockerfile, integration)	4m 5s
test / run (oci-snapshotter-stargz, ./frontend/dockerfile, dockerfile)	6m 2s
image (mainline)	4m 57s
image (labs)	4m 38s
release	0s
	1h 28m 24s

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