Limit heap size for Gradle daemons forked by the smoke tests

Author: nikita-tkachenko-datadog

dd-java-agent/agent-ci-visibility/civisibility-test-fixtures/src/main/groovy/datadog/trace/civisibility/CiVisibilitySmokeTest.groovy

@@ -68,7 +68,7 @@ abstract class CiVisibilitySmokeTest extends Specification {
   }
 
   protected List<String> buildJvmArguments(String mockBackendIntakeUrl, String serviceName, Map<String, String> additionalArgs) {
-    List<String> arguments = []
+    List<String> arguments = ["-Xms512m", "-Xmx512m"]
     Map<String, String> argMap = buildJvmArgMap(mockBackendIntakeUrl, serviceName, additionalArgs)
 
     // for convenience when debugging locally

dd-smoke-tests/gradle/src/test/groovy/datadog/smoketest/GradleDaemonSmokeTest.groovy

@@ -27,9 +27,6 @@ class GradleDaemonSmokeTest extends AbstractGradleTest {
 
   private static final int GRADLE_DISTRIBUTION_NETWORK_TIMEOUT = 30_000 // Gradle's default timeout is 10s
 
-  // TODO: Gradle daemons started by the TestKit have an idle period of 3 minutes
-  //  so by the time tests finish, at least some of the daemons are still alive.
-  //  Because of that the temporary TestKit folder cannot be fully deleted
   @Shared
   @TempDir
   Path testKitFolder