Limit heap size for Gradle daemons forked by the smoke tests (#10089)

Author: nikita-tkachenko-datadog

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

@@ -75,7 +75,7 @@ abstract class CiVisibilitySmokeTest extends Specification {
   }
 
   protected List<String> buildJvmArguments(String mockBackendIntakeUrl, String serviceName, Map<String, String> additionalArgs) {
-    List<String> arguments = []
+    List<String> arguments = ["-Xms256m", "-Xmx256m"]
 
     arguments += preventJulPrefsFileLock()
 

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

dd-smoke-tests/junit-console/src/test/groovy/datadog/smoketest/JUnitConsoleSmokeTest.groovy

@@ -220,7 +220,7 @@ class JUnitConsoleSmokeTest extends CiVisibilitySmokeTest {
 
   String javaToolOptions(Map<String, String> additionalAgentArgs) {
     additionalAgentArgs.put(CiVisibilityConfig.CIVISIBILITY_BUILD_INSTRUMENTATION_ENABLED, "false")
-    return buildJvmArguments(mockBackend.intakeUrl, TEST_SERVICE_NAME, additionalAgentArgs).join("\\ ")
+    return buildJvmArguments(mockBackend.intakeUrl, TEST_SERVICE_NAME, additionalAgentArgs).join(" ")
   }
 
   private static class StreamConsumer extends Thread {