ci: add more owners for some categories (angular#37994)

* Add petebacondarwin to public-api, size-tracking, and circular-dependencies
* Add mhevery, josephperrott, and jelbourn to code-ownership

PR Close angular#37994

Author: jelbourn

.pullapprove.yml

@@ -1122,9 +1122,10 @@ groups:
           ])
     reviewers:
       users:
-        - alxhub
         - IgorMinar
+        - alxhub
         - jelbourn
+        - petebacondarwin
         - pkozlowski-opensource
     reviews:
       request: -1   # request reviews from everyone
@@ -1145,9 +1146,10 @@ groups:
           ])
     reviewers:
       users:
-        - alxhub
         - IgorMinar
+        - alxhub
         - jelbourn
+        - petebacondarwin
         - pkozlowski-opensource
     reviews:
       request: -1   # request reviews from everyone
@@ -1171,6 +1173,7 @@ groups:
         - IgorMinar
         - jelbourn
         - josephperrott
+        - petebacondarwin
         - pkozlowski-opensource
 
 
@@ -1192,6 +1195,9 @@ groups:
     reviewers:
       users:
         - IgorMinar
+        - jelbourn
+        - josephperrott
+        - mhevery
 
 
   # ====================================================