Promote oomichi to approver in test/

Author: spiffxp

test/OWNERS

@@ -30,7 +30,6 @@ reviewers:
   - zmerlynn
   - vishh
   - MaciekPytel # for test/e2e/common/autoscaling_utils.go
-  - oomichi
   - xichengliudui
   - andrewsykim
   - neolit123
@@ -58,6 +57,7 @@ approvers:
   - mikedanese
   - msau42 # for test/e2e/commmon/{*volume,empty_dir}.go and test/e2e/framework/{pv|volume}_util.go
   - ncdc
+  - oomichi
   - pwittrock # for test/e2e/kubectl.go
   - saad-ali
   - shyamjvs