Merge branch '47519-discussion-padding' into 'master'

Resolve "discussion has a weird margin around it"

Closes #47519 and #47507

See merge request gitlab-org/gitlab-ce!19569

app/assets/stylesheets/bootstrap_migration.scss

@@ -118,10 +118,6 @@ code {
   }
 }
 
-.code {
-  padding: 9.5px;
-}
-
 table {
   // Remove any table border lines
   border-spacing: 0;