Pick "[enhance](Cooldown) Use config to control whether use cooldown replica for scanning first" (#38322)

## Proposed changes

<!--Describe your changes.-->

Same as master #37492

fe/fe-common/src/main/java/org/apache/doris/common/Config.java

@@ -2735,6 +2735,9 @@ public class Config extends ConfigBase {
             "Stream_Load When importing, the maximum length of label is limited"})
     public static int label_regex_length = 128;
 
+    @ConfField(mutable = true)
+    public static boolean enable_cooldown_replica_affinity = true;
+
     //==========================================================================
     //                      end of cloud config
     //==========================================================================