Align with ocp/knative-eventing repo (knative-extensions#375)

Signed-off-by: Matthias Wessendorf <mwessend@redhat.com>

OWNERS

@@ -1,17 +1,7 @@
 # The OWNERS file is used by prow to automatically merge approved PRs.
 
 approvers:
-- devguyio
-- alanfx
-- aliok
-- lberk
-- markusthoemmes
-- matzew
-- mgencur
-- warrenvw
+- eventing-approvers
 
 reviewers:
-- devguyio
-- aliok
-- lberk
-- matzew
+- eventing-reviewers

OWNERS_ALIASES

@@ -1,16 +1,16 @@
 aliases:
- technical-oversight-committee:
-  - evankanderson
-  - grantr
-  - markusthoemmes
-  - mattmoor
-  - tcnghia
- wg-leads:
-  # eventing
-  - grantr
-  - Harwayne
-  - vaikas
-  - n3wscott
-  - matzew
-  - nachocano
-  - lionelvillard
+ eventing-approvers:
+ - alanfx
+ - aliok
+ - devguyio
+ - jcrossley3
+ - lberk
+ - markusthoemmes
+ - matzew
+ - mgencur
+ - skonto
+ eventing-reviewers:
+ - aliok
+ - devguyio
+ - lberk
+ - matzew