[Engine] make Engine.Result#setTransLogLocation() setTook() freeze() public

Author: jinnyatw

server/src/main/java/org/opensearch/index/engine/Engine.java

@@ -561,23 +561,23 @@ public Operation.TYPE getOperationType() {
             return operationType;
         }
 
-        void setTranslogLocation(Translog.Location translogLocation) {
+        public void setTranslogLocation(Translog.Location translogLocation) {
             if (freeze.get() == null) {
                 this.translogLocation = translogLocation;
             } else {
                 throw new IllegalStateException("result is already frozen");
             }
         }
 
-        void setTook(long took) {
+        public void setTook(long took) {
             if (freeze.get() == null) {
                 this.took = took;
             } else {
                 throw new IllegalStateException("result is already frozen");
             }
         }
 
-        void freeze() {
+        public void freeze() {
             freeze.set(true);
         }