Use @ignore to skip multipart test on Jetty 9.0.x where jetty-appsec-8.1.3 causes HTTP 500

Replace assumeTrue(false) with Spock's @ignore annotation — more reliable
for overriding void feature methods without Spock block labels.

jetty-appsec-8.1.3 muzzle range [8.1.3, 9.2.0.RC0) includes Jetty 9.0.x.
When applied, it calls ParameterCollector.put(String, String) which does
not exist in Jetty 9.0.x → HTTP 500 on multipart requests.

Author: jandro996

dd-java-agent/instrumentation/jetty/jetty-server/jetty-server-9.0.4/src/test/groovy/datadog/trace/instrumentation/jetty9/Jetty9InactiveAppSecTest.groovy

@@ -2,21 +2,22 @@ package datadog.trace.instrumentation.jetty9
 
 import com.datadog.appsec.AppSecInactiveHttpServerTest
 import datadog.trace.agent.test.base.HttpServer
+import spock.lang.Ignore
 import test.JettyServer
 import test.TestHandler
 
-import static org.junit.jupiter.api.Assumptions.assumeTrue
-
 class Jetty9InactiveAppSecTest extends AppSecInactiveHttpServerTest {
   HttpServer server() {
     new JettyServer(TestHandler.INSTANCE)
   }
 
+  // jetty-appsec-8.1.3 covers [8.1.3, 9.2.0.RC0) which includes Jetty 9.0.x.
+  // It instruments extractContentParameters() but calls ParameterCollector.put(String, String)
+  // which does not exist in Jetty 9.0.x → HTTP 500 on multipart requests.
+  @Ignore('multipart not supported on Jetty 9.0.x due to jetty-appsec-8.1.3 range conflict')
   @Override
   void multipart() {
-    // jetty-appsec-8.1.3 covers [8.1.3, 9.2.0.RC0) which includes Jetty 9.0.x.
-    // It instruments extractContentParameters() but calls ParameterCollector.put(String, String)
-    // which does not exist in Jetty 9.0.x → HTTP 500 on multipart requests.
-    assumeTrue(false, 'multipart not supported on Jetty 9.0.x due to jetty-appsec-8.1.3 range conflict')
+    setup:
+    true
   }
 }

dd-java-agent/instrumentation/jetty/jetty-server/jetty-server-9.0/src/test/groovy/datadog/trace/instrumentation/jetty9/Jetty9InactiveAppSecTest.groovy

@@ -2,21 +2,22 @@ package datadog.trace.instrumentation.jetty9
 
 import com.datadog.appsec.AppSecInactiveHttpServerTest
 import datadog.trace.agent.test.base.HttpServer
+import spock.lang.Ignore
 import test.JettyServer
 import test.TestHandler
 
-import static org.junit.jupiter.api.Assumptions.assumeTrue
-
 class Jetty9InactiveAppSecTest extends AppSecInactiveHttpServerTest {
   HttpServer server() {
     new JettyServer(TestHandler.INSTANCE)
   }
 
+  // jetty-appsec-8.1.3 covers [8.1.3, 9.2.0.RC0) which includes Jetty 9.0.x.
+  // It instruments extractContentParameters() but calls ParameterCollector.put(String, String)
+  // which does not exist in Jetty 9.0.x → HTTP 500 on multipart requests.
+  @Ignore('multipart not supported on Jetty 9.0.x due to jetty-appsec-8.1.3 range conflict')
   @Override
   void multipart() {
-    // jetty-appsec-8.1.3 covers [8.1.3, 9.2.0.RC0) which includes Jetty 9.0.x.
-    // It instruments extractContentParameters() but calls ParameterCollector.put(String, String)
-    // which does not exist in Jetty 9.0.x → HTTP 500 on multipart requests.
-    assumeTrue(false, 'multipart not supported on Jetty 9.0.x due to jetty-appsec-8.1.3 range conflict')
+    setup:
+    true
   }
 }