chore(server): improve dev logs formatting (#41109)
# Why
Use the custom, build-in logger for the dev server messages, to unify
their appearance with other ones:
<img width="415" alt="Screenshot 2022-10-02 135927"
src="https://user-images.githubusercontent.com/719641/193454207-88c415a2-9b43-45f3-ae52-3f088bccfd01.png">
# How
Replace `console` with `Log` calls in `next-dev-server.ts`.
