[chore](ga)To establish a CODEOWNERS mechanism for version 2.1: (apache#48869)

As 2.1 stabilizes, we will focus solely on bug fixes, meaning no new
features will be merged into this release. post-merge reviews can be
costly. To ensure proper oversight, all pull requests targeting 2.1 must
receive explicit approval from the RM before merging.

Author: CalvinKirs

.asf.yaml

@@ -109,10 +109,10 @@ github:
           - FE UT (Doris FE UT)
           - BE UT (Doris BE UT)
           - P0 Regression (Doris Regression)
-
-        required_pull_request_reviews:
-          dismiss_stale_reviews: true
+      required_pull_request_reviews:
+          require_code_owner_reviews: true
           required_approving_review_count: 1
+          dismiss_stale_reviews: true
 
     branch-2.0:
       required_status_checks: