Suggest ./gradlew instead of ./gradle (#136572)

Author: prdoyle

build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/transport/ValidateTransportVersionReferencesTask.java

@@ -59,7 +59,7 @@ public void validateTransportVersions() throws IOException {
                         + "\") was used at "
                         + tvReference.location()
                         + ", but lacks a transport version definition. "
-                        + "If this is a new transport version, run './gradle generateTransportVersion'."
+                        + "If this is a new transport version, run './gradlew generateTransportVersion'."
                 );
             }
         }

server/src/main/java/org/elasticsearch/TransportVersion.java

@@ -257,7 +257,7 @@ public static TransportVersion fromName(String name) {
                 message.append(names);
                 message.append("?");
             }
-            message.append(" If this is a new transport version, run './gradle generateTransportVersion'.");
+            message.append(" If this is a new transport version, run './gradlew generateTransportVersion'.");
             throw new IllegalStateException(message.toString());
         }
         return known;

server/src/test/java/org/elasticsearch/TransportVersionTests.java

@@ -400,7 +400,7 @@ public void testMoreLikeThis() {
             is(
                 "Unknown transport version [to_child_lock_join_query]. "
                     + "Did you mean [to_child_block_join_query]? "
-                    + "If this is a new transport version, run './gradle generateTransportVersion'."
+                    + "If this is a new transport version, run './gradlew generateTransportVersion'."
             )
         );
 
@@ -409,7 +409,7 @@ public void testMoreLikeThis() {
             ise.getMessage(),
             is(
                 "Unknown transport version [brand_new_version_unrelated_to_others]. "
-                    + "If this is a new transport version, run './gradle generateTransportVersion'."
+                    + "If this is a new transport version, run './gradlew generateTransportVersion'."
             )
         );
     }