[FEATURE REQ] Upgrade Netty dependencies in Cosmos SDK

**Is your feature request related to a problem? Please describe.**

In direct mode, the current Netty version adopted by Cosmos SDK uses an Netty version does not verify endpoint. [Not doing hostname verification is obsolete and insecure practice](https://github.com/netty/netty/wiki/Netty-4.2-Migration-Guide).

Current Cosmos SDK API version does not offer ways to configure/validate the endpoint.

**Describe the solution you'd like**

I would vote that Cosmos SDK adopts a more recent and less vulnerable [Netty version](https://mvnrepository.com/artifact/com.azure/azure-core-http-netty/1.16.0). Ideally the latest 4.2.x

**Describe alternatives you've considered**

I considered upgrading the Netty dependencies myself but current Cosmos SDK code will not work without a patch.

Thanks!