[fix](grace-stop) remove heartbeat condition (#58019)

Followup #56601

Author: morningman

fe/fe-core/src/main/java/org/apache/doris/cloud/catalog/CloudReplica.java

@@ -419,11 +419,7 @@ public long hashReplicaToBe(String clusterId, boolean isBackGround) throws Compu
         List<Backend> availableBes = new ArrayList<>();
         List<Backend> decommissionAvailBes = new ArrayList<>();
         for (Backend be : clusterBes) {
-            long lastUpdateMs = be.getLastUpdateMs();
-            long missTimeMs = Math.abs(lastUpdateMs - System.currentTimeMillis());
-            // be core or restart must in heartbeat_interval_second
-            if ((be.isQueryAvailable() || missTimeMs <= Config.heartbeat_interval_second * 1000L)
-                    && !be.isSmoothUpgradeSrc()) {
+            if (be.isQueryAvailable() && !be.isSmoothUpgradeSrc()) {
                 if (be.isDecommissioned()) {
                     decommissionAvailBes.add(be);
                 } else {