Update Gradle to 8.11 (#800)

Changes:
- Update wrapper by running the following command:
  ./gradlew wrapper --gradle-version 8.11 --gradle-distribution-sha256-sum
  57dafb5c2622c6cc08b993c85b7c06956a2f53536432a30ead46166dbca0f1e9
- Verify wrapper JAR integrity according to:
  https://docs.gradle.org/current/userguide/gradle_wrapper.html#
  manually_verifying_the_gradle_wrapper_jar
- Replace usages of deprecated method `Project.exec` with `ExecOperations.exec`
- Convert extension function `Task.configureInstallGraalVm` to task class `InstallGraalVm`
  - a task class is the cleanest way to get hold of `ExecOperations`
- Move extension property `BuildInfo.GraalVm.downloadFile` into class `GraalVm`
- Don't apply plugin `pklGraalVm` in project `bench` (unnecessary, now causes error)

buildSrc/src/main/kotlin/pklGraalVm.gradle.kts

@@ -15,20 +15,11 @@
  */
 import de.undercouch.gradle.tasks.download.Download
 import de.undercouch.gradle.tasks.download.Verify
-import java.nio.file.*
-import java.util.UUID
-import kotlin.io.path.createDirectories
 
 plugins { id("de.undercouch.download") }
 
 val buildInfo = project.extensions.getByType<BuildInfo>()
 
-val BuildInfo.GraalVm.downloadFile
-  get(): File {
-    val extension = if (buildInfo.os.isWindows) "zip" else "tar.gz"
-    return file(homeDir).resolve("${baseName}.$extension")
-  }
-
 // tries to minimize chance of corruption by download-to-temp-file-and-move
 val downloadGraalVmAarch64 by
   tasks.registering(Download::class) { configureDownloadGraalVm(buildInfo.graalVmAarch64) }
@@ -68,63 +59,16 @@ fun Verify.configureVerifyGraalVm(graalvm: BuildInfo.GraalVm) {
   algorithm("SHA-256")
 }
 
-// minimize chance of corruption by extract-to-random-dir-and-flip-symlink
+@Suppress("unused")
 val installGraalVmAarch64 by
-  tasks.registering {
+  tasks.registering(InstallGraalVm::class) {
     dependsOn(verifyGraalVmAarch64)
-    configureInstallGraalVm(buildInfo.graalVmAarch64)
+    graalVm = buildInfo.graalVmAarch64
   }
 
-// minimize chance of corruption by extract-to-random-dir-and-flip-symlink
+@Suppress("unused")
 val installGraalVmAmd64 by
-  tasks.registering {
+  tasks.registering(InstallGraalVm::class) {
     dependsOn(verifyGraalVmAmd64)
-    configureInstallGraalVm(buildInfo.graalVmAmd64)
+    graalVm = buildInfo.graalVmAmd64
   }
-
-fun Task.configureInstallGraalVm(graalVm: BuildInfo.GraalVm) {
-  onlyIf { !graalVm.installDir.exists() }
-
-  doLast {
-    val distroDir = Paths.get(graalVm.homeDir, UUID.randomUUID().toString())
-
-    try {
-      distroDir.createDirectories()
-      println("Extracting ${graalVm.downloadFile} into $distroDir")
-      // faster and more reliable than Gradle's `copy { from tarTree() }`
-      exec {
-        workingDir = file(distroDir)
-        executable = "tar"
-        args("--strip-components=1", "-xzf", graalVm.downloadFile)
-      }
-
-      val distroBinDir =
-        if (buildInfo.os.isMacOsX) distroDir.resolve("Contents/Home/bin")
-        else distroDir.resolve("bin")
-
-      println("Installing native-image into $distroDir")
-      exec {
-        val executableName = if (buildInfo.os.isWindows) "gu.cmd" else "gu"
-        executable = distroBinDir.resolve(executableName).toString()
-        args("install", "--no-progress", "native-image")
-      }
-
-      println("Creating symlink ${graalVm.installDir} for $distroDir")
-      val tempLink = Paths.get(graalVm.homeDir, UUID.randomUUID().toString())
-      Files.createSymbolicLink(tempLink, distroDir)
-      try {
-        Files.move(tempLink, graalVm.installDir.toPath(), StandardCopyOption.ATOMIC_MOVE)
-      } catch (e: Exception) {
-        try {
-          delete(tempLink.toFile())
-        } catch (ignored: Exception) {}
-        throw e
-      }
-    } catch (e: Exception) {
-      try {
-        delete(distroDir)
-      } catch (ignored: Exception) {}
-      throw e
-    }
-  }
-}