ci(devenv): fully build SOLVCON with devenv
ci(devenv): fully build SOLVCON with devenv

The latest devenv begins to support SOLVCON build fully
https://github.com/solvcon/devenv/pull/91 . It means that conda is not
necessary anymore. Thus we can run our CI with devenv fully without
conda.

Github action will spend around 50 minutes to complete this build, so
let us trigger it weekly only.

Issue: #242

solvcon/solvcon,solvcon/solvcon,solvcon/solvcon,solvcon/solvcon,solvcon/solvcon,solvcon/solvcon