Avoid wiremock extension using port 8080 (#13601)

Author: laurit

instrumentation/aws-sdk/aws-sdk-2.2/testing/src/main/java/io/opentelemetry/instrumentation/awssdk/v2_2/recording/RecordingExtension.java

@@ -31,6 +31,7 @@ public RecordingExtension(String apiUrl) {
         WireMockExtension.newInstance()
             .options(
                 options()
+                    .dynamicPort()
                     .extensions(
                         ResponseHeaderScrubber.class,
                         PrettyPrintEqualToJsonStubMappingTransformer.class)