Style: clang-format: Disable AllowShortIfStatementsOnASingleLine

Part of #33027, also discussed in #29848.

Enforcing the use of brackets even on single line statements would be
preferred, but `clang-format` doesn't have this functionality yet.

core/list.h

@@ -353,7 +353,8 @@ public:
 
 		Element *it = front();
 		while (it) {
-			if (it->value == p_val) return it;
+			if (it->value == p_val)
+				return it;
 			it = it->next();
 		};