Decrease max heap size for test process on Windows

Test processes themselves don't do much
(RAM heavy work is done in Kotlin and Gradle daemons).
The default 1600m max heap size is unreasonably high
for copying test projects and checking output logs.

libraries/tools/kotlin-gradle-plugin-integration-tests/build.gradle.kts

@@ -128,6 +128,8 @@ tasks.withType<Test> {
 
     useAndroidSdk()
 
+    maxHeapSize = "512m"
+
     testLogging {
         // set options for log level LIFECYCLE
         events("passed", "skipped", "failed", "standardOut")