[Gradle] disable toolchain auto-download in tests

Required JDKs should be already downloaded by Kotlin repo itself.

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

@@ -418,6 +418,8 @@ private fun commonBuildSetup(
     kotlinDaemonDebugPort: Int? = null,
 ): List<String> {
     return buildOptions.toArguments(gradleVersion) + buildArguments + listOfNotNull(
+        // Required toolchains should be pre-installed via repo. Tests should not download any JDKs
+        "-Porg.gradle.java.installations.auto-download=false",
         "--full-stacktrace",
         if (enableBuildCacheDebug) "-Dorg.gradle.caching.debug=true" else null,
         if (enableBuildScan) "--scan" else null,