[7.5] fix incorrect comparison (#48208) (#48304)

* remove comparison of identical values

the comparison `tookInMillis == tookInMillis` is always true.

* add comparison between tookInMillis

client/rest-high-level/src/main/java/org/elasticsearch/client/core/TermVectorsResponse.java

@@ -149,7 +149,7 @@ public boolean equals(Object obj) {
             && Objects.equals(id, other.id)
             && docVersion == other.docVersion
             && found == other.found
-            && tookInMillis == tookInMillis
+            && tookInMillis == other.tookInMillis
             && Objects.equals(termVectorList, other.termVectorList);
     }