Use CODEOWNERS instead of dependabot reviewers (#2019)

* Use CODEOWNERS instead of dependabot reviewers

* Remove incorrect CODEOWNER

olivergondza is no longer a maintainer

---------

Co-authored-by: Mark Waite <[email protected]>

Author: shenxianpeng

.github/CODEOWNERS

@@ -1,4 +1,3 @@
 * @jenkinsci/team-docker-packaging
-*/rhel/ubi*/ @olivergondza
 */debian/bookworm/hotspot @ksalerno99
 */rhel/ubi9/hotspot @ksalerno99

.github/dependabot.yml

@@ -10,9 +10,6 @@ updates:
     interval: weekly
   open-pull-requests-limit: 2
   target-branch: master
-  reviewers:
-  - MarkEWaite
-  - slide
   labels:
   - dependencies
   ignore:
@@ -27,9 +24,6 @@ updates:
     interval: weekly
   open-pull-requests-limit: 2
   target-branch: master
-  reviewers:
-  - MarkEWaite
-  - slide
   labels:
   - dependencies
   ignore:
@@ -42,9 +36,6 @@ updates:
     interval: weekly
   open-pull-requests-limit: 2
   target-branch: master
-  reviewers:
-  - MarkEWaite
-  - slide
   labels:
   - dependencies
   ignore:
@@ -59,9 +50,6 @@ updates:
     interval: weekly
   open-pull-requests-limit: 2
   target-branch: master
-  reviewers:
-    - olivergondza
-    - slide
   labels:
     - dependencies
   ignore: