[ci skip] Use Java toolchain for run tasks (#6108)

patches/server/0001-Setup-Gradle-project.patch

@@ -20,10 +20,10 @@ index 67fb370cad6924895a6b27052dbd5c1767e3f0c9..3e05459f27c4c5697ae65da504d67a6a
  /.project
 diff --git a/build.gradle.kts b/build.gradle.kts
 new file mode 100644
-index 0000000000000000000000000000000000000000..e9db6b3bad237c0b3fdb14e96b6f0f29ba8ee312
+index 0000000000000000000000000000000000000000..be565d252e326991f491cab3bfd3acc8356bbc7f
 --- /dev/null
 +++ b/build.gradle.kts
-@@ -0,0 +1,135 @@
+@@ -0,0 +1,138 @@
 +import com.github.jengelman.gradle.plugins.shadow.transformers.Log4j2PluginsCacheFileTransformer
 +import com.github.jengelman.gradle.plugins.shadow.transformers.Transformer
 +import io.papermc.paperweight.util.Git
@@ -135,6 +135,9 @@ index 0000000000000000000000000000000000000000..e9db6b3bad237c0b3fdb14e96b6f0f29
 +    doFirst {
 +        workingDir.mkdirs()
 +    }
++    javaLauncher.set(project.javaToolchains.launcherFor {
++        languageVersion.set(JavaLanguageVersion.of(project.tasks.compileJava.get().options.release.get()))
++    })
 +    block(this)
 +}
 +