Fix cachability of transport validation tasks (elastic#136484) (elastic#136506)

The transport version validation tasks were meant to be cachable, but
since they don't output a file they aren't actually cachable. This
commit fixes these tasks by making them PrecommitTasks which output a
marker file on success.

Author: rjernst

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

@@ -9,7 +9,7 @@
 
 package org.elasticsearch.gradle.internal.transport;
 
-import org.gradle.api.DefaultTask;
+import org.elasticsearch.gradle.internal.conventions.precommit.PrecommitTask;
 import org.gradle.api.file.RegularFileProperty;
 import org.gradle.api.provider.Property;
 import org.gradle.api.services.ServiceReference;
@@ -30,7 +30,7 @@
  * Validates that each transport version reference has a referable definition.
  */
 @CacheableTask
-public abstract class ValidateTransportVersionReferencesTask extends DefaultTask implements VerificationTask {
+public abstract class ValidateTransportVersionReferencesTask extends PrecommitTask implements VerificationTask {
 
     @ServiceReference("transportVersionResources")
     abstract Property<TransportVersionResourcesService> getTransportResources();

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

@@ -11,8 +11,8 @@
 
 import com.google.common.collect.Comparators;
 
+import org.elasticsearch.gradle.internal.conventions.precommit.PrecommitTask;
 import org.elasticsearch.gradle.internal.transport.TransportVersionResourcesService.IdAndDefinition;
-import org.gradle.api.DefaultTask;
 import org.gradle.api.file.ConfigurableFileCollection;
 import org.gradle.api.provider.Property;
 import org.gradle.api.services.ServiceReference;
@@ -40,7 +40,7 @@
  * Validates that each defined transport version constant is referenced by at least one project.
  */
 @CacheableTask
-public abstract class ValidateTransportVersionResourcesTask extends DefaultTask implements VerificationTask {
+public abstract class ValidateTransportVersionResourcesTask extends PrecommitTask implements VerificationTask {
 
     @InputDirectory
     @Optional