Remove custom cache version checks from Gradle

#KT-21009 fixed

Cache version could be changed only when compiler is changed.

@InputFiles on `AbstractKotlinCompileTool#computedCompilerClasspath`
ensures that non incremental build is performed when compiler is changed.

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/CacheVersionChangedIT.kt

@@ -1,53 +0,0 @@
-package org.jetbrains.kotlin.gradle
-
-import org.junit.Test
-import java.io.File
-import kotlin.test.assertNotEquals
-import kotlin.test.assertTrue
-
-class CacheVersionChangedIT : BaseGradleIT() {
-    @Test
-    fun testGradleCacheVersionChanged() {
-        compileIncrementallyWithChangedVersion("gradle-format-version.txt")
-    }
-
-    @Test
-    fun testNormalCacheVersionChanged() {
-        compileIncrementallyWithChangedVersion("format-version.txt")
-    }
-    @Test
-    fun testDataContainerCacheVersionChanged() {
-        compileIncrementallyWithChangedVersion("data-container-format-version.txt")
-    }
-
-    private fun compileIncrementallyWithChangedVersion(versionFileName: String) {
-        val project = Project("kotlinProject", "2.10")
-        val options = defaultBuildOptions().copy(incremental = true)
-
-        fun File.projectPath() = relativeTo(project.projectDir).path
-
-        project.build("build", options = options) {
-            assertSuccessful()
-        }
-
-        val versionFile = File(project.projectDir, "build/kotlin/compileKotlin/$versionFileName")
-        assertTrue(versionFile.exists(), "${versionFile.projectPath()} does not exist!")
-        val modifiedVersion = "777"
-        versionFile.writeText(modifiedVersion)
-
-        project.build("build", options = options) {
-            assertSuccessful()
-            assertNotEquals(modifiedVersion, versionFile.readText(), "${versionFile.projectPath()} was not rewritten by build")
-
-            val mainDir = File(project.projectDir, "src/main")
-            val mainKotlinFiles = mainDir.walk().filter { it.isFile && it.extension.equals("kt", ignoreCase = true) }
-            val mainKotlinRelativePaths = mainKotlinFiles.map(File::projectPath).toList()
-            assertCompiledKotlinSources(mainKotlinRelativePaths)
-        }
-
-        project.build("build", options = options) {
-            assertSuccessful()
-            assertCompiledKotlinSources(listOf(), weakTesting = false)
-        }
-    }
-}

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/tasks/Tasks.kt

@@ -77,12 +77,6 @@ abstract class AbstractKotlinCompile<T : CommonCompilerArguments>() : AbstractKo
     internal val taskBuildDirectory: File
         get() = File(File(project.buildDir, KOTLIN_BUILD_DIR_NAME), name).apply { mkdirs() }
 
-    private val cacheVersions: List<CacheVersion>
-        get() =
-            listOf(normalCacheVersion(taskBuildDirectory, enabled = incremental),
-                   dataContainerCacheVersion(taskBuildDirectory, enabled = incremental),
-                   gradleCacheVersion(taskBuildDirectory, enabled = incremental))
-
     // indicates that task should compile kotlin incrementally if possible
     // it's not possible when IncrementalTaskInputs#isIncremental returns false (i.e first build)
     var incremental: Boolean = false
@@ -92,13 +86,6 @@ abstract class AbstractKotlinCompile<T : CommonCompilerArguments>() : AbstractKo
             logger.kotlinDebug { "Set $this.incremental=$value" }
         }
 
-    internal val isCacheFormatUpToDate: Boolean
-        get() {
-            if (!incremental) return true
-
-            return cacheVersions.all { it.checkVersion() == CacheVersion.Action.DO_NOTHING }
-        }
-
     abstract protected fun createCompilerArgs(): T
 
     internal val pluginOptions = CompilerPluginOptions()

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/tasks/TasksProvider.kt

@@ -41,7 +41,6 @@ internal open class KotlinTasksProvider {
         this.sourceSetName = sourceSetName
         this.friendTaskName = taskToFriendTaskMapper[this]
         mapKotlinTaskProperties(project, this)
-        outputs.upToDateWhen { isCacheFormatUpToDate }
     }
 
     protected open val taskToFriendTaskMapper: TaskToFriendTaskMapper =