remove the need for `meshconfig` when building initial discovery requests.

[believening]

We have not used meshconfig historically or currently, and need to check if it can be removed.

https://github.com/slime-io/slime/blob/0bdcb6c9baa5afa6709f03557a1d65254b0d3b4e/framework/bootstrap/adsc/adsc.go#L10-L12