Setting spring.netty.leak-detection has no effect when lazy initialization is enabled

[mhalbritter]

Like #45846, when enabling lazy init, Netty's ResourceLeakDetector won't be enabled. It's set up in the constructor of NettyAutoConfiguration, which won't run when lazy init is enabled.

[nosan]

I've made some changes to my branch 3.4.x...nosan:spring-boot:46013