sig cluster-lifecycle: Add capi kubevirt subproject

Author: mrbobbytables

sig-cluster-lifecycle/README.md

@@ -96,6 +96,9 @@ The following [subprojects][subproject-definition] are owned by sig-cluster-life
 ### cluster-api-provider-kubemark
 - **Owners:**
   - [kubernetes-sigs/cluster-api-provider-kubemark](https://github.com/kubernetes-sigs/cluster-api-provider-kubemark/blob/master/OWNERS)
+### cluster-api-provider-kubevirt
+- **Owners:**
+  - [kubernetes-sigs/cluster-api-provider-kubevirt](https://github.com/kubernetes-sigs/cluster-api-provider-kubevirt/blob/main/OWNERS)
 ### cluster-api-provider-nested
 - **Owners:**
   - [kubernetes-sigs/cluster-api-provider-nested](https://github.com/kubernetes-sigs/cluster-api-provider-nested/blob/master/OWNERS)

sigs.yaml

@@ -1028,6 +1028,9 @@ sigs:
   - name: cluster-api-provider-kubemark
     owners:
     - https://raw.githubusercontent.com/kubernetes-sigs/cluster-api-provider-kubemark/master/OWNERS
+  - name: cluster-api-provider-kubevirt
+    owners:
+    - https://raw.githubusercontent.com/kubernetes-sigs/cluster-api-provider-kubevirt/main/OWNERS
   - name: cluster-api-provider-nested
     owners:
     - https://raw.githubusercontent.com/kubernetes-sigs/cluster-api-provider-nested/master/OWNERS