[Release-1.27] - Bump containerd to v1.7.15

[brandond]

Backport fix for Bump containerd to v1.7.15

• Bump containerd to v1.7.15 #9884

[endawkins]

Validated on 1.27 using commit 33ee168 | version 1.27

 Cluster nodes:
 ip-[redacted].us-east-2.compute.internal   Ready   control-plane,etcd,master   25s   v1.27.13-rc1+k3s1   [redacted]   [redacted]   Ubuntu 22.04.1 LTS   5.15.0-1019-aws   containerd://1.7.15-k3s1.27

 Command:
  kubectl get node -o yaml  --kubeconfig=/tmp/elwoodk3sval127_kubeconfig  | grep  containerd
 ---------------------
 Assertion:
 1.7.15
 ----------------------
 Matched with result:
 containerRuntimeVersion: containerd://1.7.15-k3s1.27