Switch containerd grpc socket to URI

[towo]

Adjusts the containerd configuration to properly address the containerd socket via URI; fixes deprecation warnings when using crictl on nodes.

[david22swan]

Just rekicking tests

[GSPatton]

looks good. Integration test failures aren't related to this PR

[deric]

After this change containerd v1.6.6 won't bind to /run/containerd/containerd.sock

ll /run/containerd/containerd.sock*
srw-rw---- 1 root root 0 Dec 10 12:16 /run/containerd/containerd.sock.ttrpc=

logs

Dec 10 12:22:53 s01 containerd[4031907]: time="2022-12-10T12:22:53.244348892Z" level=info msg=serving... address="unix:///run/containerd/containerd.sock.ttrpc"
Dec 10 12:22:53 s01 containerd[4031907]: time="2022-12-10T12:22:53.244415978Z" level=info msg=serving... address="unix:///run/containerd/containerd.sock"
Dec 10 12:22:53 s01 containerd[4031907]: time="2022-12-10T12:22:53.244436657Z" level=info msg="containerd successfully booted in 0.046892s"
Dec 10 12:22:53 s01 containerd[4031907]: time="2022-12-10T12:22:53.414542407Z" level=info msg="Start event monitor"
Dec 10 12:22:53 s01 containerd[4031907]: time="2022-12-10T12:22:53.414601508Z" level=info msg="Start snapshots syncer"
Dec 10 12:22:53 s01 containerd[4031907]: time="2022-12-10T12:22:53.414615324Z" level=info msg="Start cni network conf syncer for default"
Dec 10 12:22:53 s01 containerd[4031907]: time="2022-12-10T12:22:53.414624581Z" level=info msg="Start streaming server"

while it works fine with former configuration:

[grpc]
  address = "/run/containerd/containerd.sock"
...

ll /run/containerd/containerd.sock*
srw-rw---- 1 root root 0 Dec 10 12:23 /run/containerd/containerd.sock=
srw-rw---- 1 root root 0 Dec 10 12:23 /run/containerd/containerd.sock.ttrpc=

@towo crictl warnings should be fixed in /etc/crictl.yaml:

runtime-endpoint: unix:///var/run/containerd/containerd.sock
image-endpoint: unix:///var/run/containerd/containerd.sock

not in containerd config.