Update Gradle to 8.11

[translatenix]

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)