Remove ANR from Precompile-EVM DevContainer

[martineckardt]

We now have ANR and Avalanche CLI both in the Dev Container. As soon as we updated the Precompile-EVM course to use Avalanche CLI, we should remove ANR to make the container build faster

RUN curl -sSfL https://raw.githubusercontent.com/ava-labs/avalanche-network-runner/main/scripts/install.sh | sh -s

Also let's make sure that ANR is nowhere used in the academy course anymore and everything is using Avalanche CLI