Merge branch 'ph/enableVirtualScrollingByDefault' into 'master'

Enabled diff virtual scrolling by default

See merge request gitlab-org/gitlab!67983

config/feature_flags/development/diffs_virtual_scrolling.yml

@@ -5,4 +5,4 @@ rollout_issue_url:
 milestone: '13.12'
 type: development
 group: group::code review
-default_enabled: false
+default_enabled: true