[Gradle] Decrease in tests Gradle daemons idle timeout

Our Gradle integration tests could launch multiple Gradle daemons
with different versions and using different JDK versions. They are
stick around until the whole test finishes using necessary memory.

Especially this is a problem on our CI where OOM killer often tries
to kill actually needed daemon.

This commit decreases spawned Gradle Daemon idle timeout, so they
shut down itself much earlier than default timeout of 3 hours.

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

@@ -426,6 +426,9 @@ private fun commonBuildSetup(
         // Required toolchains should be pre-installed via repo. Tests should not download any JDKs
         "-Porg.gradle.java.installations.auto-download=false",
         "-Porg.gradle.java.installations.paths=$jdkLocations",
+        // Decreasing Gradle daemon idle timeout to 1 min from default 3 hours.
+        // This should help with OOM on CI when agents do not have enough free memory available.
+        "-Dorg.gradle.daemon.idletimeout=60000",
         if (enableBuildCacheDebug) "-Dorg.gradle.caching.debug=true" else null,
         if (enableBuildScan) "--scan" else null,
         kotlinDaemonDebugPort?.let {