Run Pekko async handler regression tests across suites

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: AlexeyKuznetsov-DD

dd-java-agent/instrumentation-testing/src/main/groovy/datadog/trace/agent/test/base/HttpServerTest.groovy

@@ -1264,7 +1264,6 @@ abstract class HttpServerTest<SERVER> extends WithHttpServer<SERVER> {
     }
   }
 
-  @Flaky(value = "https://github.com/DataDog/dd-trace-java/issues/9396", suites = ["PekkoHttpServerInstrumentationAsyncHttp2Test"])
   def "Instrumentation test exception"() {
     setup:
     def method = "GET"

dd-java-agent/instrumentation/pekko/pekko-http-1.0/build.gradle

@@ -53,21 +53,6 @@ sourceSets {
   latestPekko10Test.java.srcDir sourceSets.baseTest.java
 }
 
-// This module has no 'test' source set, so the default forked test task runs nothing here. Register
-// one per Scala generation instead.
-['baseTest', 'latestDepTest'].each { suiteName ->
-  addForkedTestTask(suiteName).configure {
-    // The other *ForkedTest classes in this module have never run, and the client ones currently
-    // fail on an unrelated NPE in PekkoHttpClientHelpers$PekkoHttpHeaders during Data Streams
-    // injection. Keep these tasks scoped until that is fixed separately.
-    setIncludes(['**/PekkoHttpAsyncHandlerWrapper*ForkedTest.class'])
-  }
-  tasks.named(suiteName, Test) {
-    // finalizedBy, not dependsOn, so a failure is reported against the task that actually ran.
-    finalizedBy "${suiteName}ForkedTest"
-  }
-}
-
 dependencies {
   compileOnly libs.scala212
   compileOnly group: 'org.apache.pekko', name: 'pekko-http-core_2.12', version: '1.0.0'