chore: mark 3.11 as required test and turn off 3.7 (#10475)

Author: rsamborski

.github/sync-repo-settings.yaml

@@ -44,8 +44,8 @@ branchProtectionRules:
   requiredStatusCheckContexts:
     - "Kokoro CI - Lint"
     - "Kokoro CI - Python 2.7 (App Engine Standard Only)"
-    - "Kokoro CI - Python 3.7"
     - "Kokoro CI - Python 3.8"
+    - "Kokoro CI - Python 3.11"
     - "cla/google"
     - "snippet-bot check"
 # List of explicit permissions to add (additive only)