Possible regression when using NewClient instead of Dial

[arvindbr8]

#7029 introduced the NewClient() API which should potentially replace grpc.Dial()

However in this branch, when I updated the orca example to use NewClient I'm seeing an error on the client side.

2024/04/02 13:24:29 Error from UnaryEcho call: rpc error: code = DeadlineExceeded desc = context deadline exceeded

This needs investigation, and possibly prioritization before the next release this week

[arvindbr8]

this is an issue with the way the orcaLB is setup. The UpdateClientConnState method was asserting that the resolver returns only 1 address. this was true in the case of passthrough, however since NewClient uses dns as default schema the resolver returned two addresses in Github VM (and in my local machine) - 1 ipv4 and 1 ipv6 address. This is not a regression.