Rename test utility methods (#120213)

Author: joegallo

test/framework/src/main/java/org/elasticsearch/test/ESTestCase.java

@@ -1237,15 +1237,15 @@ public static Long randomLongOrNull() {
         return randomBoolean() ? null : randomLong();
     }
 
-    public static Long randomPositiveLongOrNull() {
+    public static Long randomNonNegativeLongOrNull() {
         return randomBoolean() ? null : randomNonNegativeLong();
     }
 
     public static Integer randomIntOrNull() {
         return randomBoolean() ? null : randomInt();
     }
 
-    public static Integer randomPositiveIntOrNull() {
+    public static Integer randomNonNegativeIntOrNull() {
         return randomBoolean() ? null : randomNonNegativeInt();
     }
 

x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/inference/action/UnifiedCompletionRequestTests.java

@@ -183,7 +183,7 @@ public static UnifiedCompletionRequest randomUnifiedCompletionRequest() {
         return new UnifiedCompletionRequest(
             randomList(5, UnifiedCompletionRequestTests::randomMessage),
             randomAlphaOfLengthOrNull(10),
-            randomPositiveLongOrNull(),
+            randomNonNegativeLongOrNull(),
             randomStopOrNull(),
             randomFloatOrNull(),
             randomToolChoiceOrNull(),