Closes # (if applicable).

Changes proposed in this Pull Request

The new lock files approach introduced in #1660 caused macOS builds to fail because installing pyscipopt via pip does not include scip.

The proposed solution is to fetch pyscipopt from conda-forge instead of pip. This package properly bundles scip providing a complete and working environment (see updated locked files included in this PR)

The downside is that we have to drop support for ARM linux as pyscipopt does not currently provide builds via conda-forge or pip for this platform. Users will either need to install it from source or get if via a package manager when available (e.g. Arch Linux ARM package)

@lkstrp

Checklist

• I tested my contribution locally and it works as intended.
• Code and workflow changes are sufficiently documented.
• Changed dependencies are added to envs/environment.yaml.
• Changes in configuration options are added in config/config.default.yaml.
• Changes in configuration options are documented in doc/configtables/*.csv.
• Sources of newly added data are documented in doc/data_sources.rst.
• A release note doc/release_notes.rst is added.