Revert "Disable Reactor Netty's use of kqueue/epoll"

The failure continued to occur so this commit reverts commit
42c1ce65e9.

See gh-10569

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/netty/NettyReactiveWebServerFactory.java

@@ -97,7 +97,6 @@ public class NettyReactiveWebServerFactory extends AbstractReactiveWebServerFact
 			if (getCompression() != null && getCompression().getEnabled()) {
 				options.compression(getCompression().getMinResponseSize());
 			}
-			options.preferNative(false);
 			applyCustomizers(options);
 		}).build();
 	}