Update cli-runtime OWNERS file to use sig-cli-maintainers/sig-cli-reviewers

Author: brianpursley

staging/src/k8s.io/cli-runtime/OWNERS

@@ -1,20 +1,8 @@
 # See the OWNERS docs at https://go.k8s.io/owners
 
 approvers:
-  - deads2k
-  - pwittrock
-  - seans3
-  - soltysh
-  - eddiezane
-  - brianpursley
-  - KnVerey
+  - sig-cli-maintainers
 reviewers:
-  - deads2k
-  - pwittrock
-  - seans3
-  - soltysh
-  - eddiezane
-  - brianpursley
-  - KnVerey
+  - sig-cli-reviewers
 labels:
   - sig/cli