Disable caching on kover artifact tasks

Caching should only be enabled for tasks that do heavy computations
and this task does not do so.

PR #637

kover-gradle-plugin/src/functionalTest/kotlin/kotlinx/kover/gradle/plugin/test/functional/cases/BuildCacheRelocationTests.kt

@@ -55,7 +55,7 @@ class BuildCacheRelocationTests {
         val result2 = gradleBuild2.runWithParams("koverXmlReport", "koverHtmlReport", "koverBinaryReport", "koverVerify", "--build-cache", "--info")
         try {
             assertEquals("FROM-CACHE", result2.taskOutcome(":test"))
-            assertEquals("FROM-CACHE", result2.taskOutcome(":koverGenerateArtifact"))
+            assertEquals("SUCCESS", result2.taskOutcome(":koverGenerateArtifact"))
             assertEquals("FROM-CACHE", result2.taskOutcome(":koverXmlReport"))
             assertEquals("FROM-CACHE", result2.taskOutcome(":koverHtmlReport"))
             assertEquals("FROM-CACHE", result2.taskOutcome(":koverBinaryReport"))

kover-gradle-plugin/src/main/kotlin/kotlinx/kover/gradle/plugin/tasks/services/KoverArtifactGenerationTask.kt

@@ -11,6 +11,7 @@ import org.gradle.api.file.RegularFileProperty
 import org.gradle.api.provider.*
 import org.gradle.api.tasks.*
 import org.gradle.kotlin.dsl.*
+import org.gradle.work.DisableCachingByDefault
 import java.io.*
 import javax.inject.*
 
@@ -19,7 +20,7 @@ import javax.inject.*
  *
  * This artifact that will be shared between projects through dependencies for creating merged reports.
  */
-@CacheableTask
+@DisableCachingByDefault(because = "The task action is so quick that cache does not provide a benefit")
 internal abstract class KoverArtifactGenerationTask : DefaultTask() {
     @get:InputFiles
     @get:PathSensitive(PathSensitivity.RELATIVE)