MacOS: Use x86_64h Architecture

[HTRamsey]

Try using Haswell arch for macos

[Copilot]

Pull Request Overview

This PR makes deployment adjustments for Linux and macOS builds to address compatibility issues. The changes focus on updating architecture specifications and improving library dependencies for better platform support.

• Updates macOS universal build to use Haswell architecture (x86_64h) instead of standard x86_64
• Adds newer GCC toolchain repository and libstdc++6 package for ARM build compatibility
• Fixes YAML formatting in the macOS workflow configuration

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tools/setup/install-dependencies-debian.sh	Adds Ubuntu toolchain PPA and libstdc++6 package for improved ARM compatibility
cmake/Toolchain.cmake	Updates commented architecture detection logic to include x86_64h
cmake/CustomOptions.cmake	Changes universal build description to reflect x86_64h architecture
CMakeLists.txt	Updates macOS universal build to use x86_64h instead of x86_64
.github/workflows/macos.yml	Fixes YAML line continuation formatting in configure step

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