Upgrade to gradle 9 in workflows and tests (#704)

supersedes https://github.com/gradle/actions/pull/698
supersed https://github.com/gradle/actions/pull/694

sources/test/init-scripts/build.gradle

@@ -14,13 +14,15 @@ repositories {
 
 dependencies {
     testImplementation gradleTestKit()
-    testImplementation 'org.spockframework:spock-core:2.3-groovy-3.0'
-    testImplementation('org.spockframework:spock-junit4:2.3-groovy-3.0')
+    testImplementation 'org.spockframework:spock-core:2.3-groovy-4.0'
+    testImplementation('org.spockframework:spock-junit4:2.3-groovy-4.0')
 
     testImplementation ('io.ratpack:ratpack-groovy-test:1.9.0') {
         exclude group: 'org.codehaus.groovy', module: 'groovy-all'
     }
     testImplementation 'com.fasterxml.jackson.dataformat:jackson-dataformat-smile:2.19.2'
+
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
 }
 
 test {

sources/test/init-scripts/gradle/wrapper/gradle-wrapper.properties

@@ -1,7 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionSha256Sum=bd71102213493060956ec229d946beee57158dbd89d0e62b91bca0fa2c5f3531
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.3-bin.zip
+distributionSha256Sum=8fad3d78296ca518113f3d29016617c7f9367dc005f932bd9d93bf45ba46072b
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

sources/test/init-scripts/gradlew

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 #
-# Copyright © 2015-2021 the original authors.
+# Copyright © 2015 the original authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.