workflows: update workflows, templates to support arm64.

[asylumexp]

✍️ Description

This PR adds considerations for arm64 support to the .github workflows and templates. This adds a question about host arch when creating an issue, updates check node workflow to support arm64, and makes has_arm get pushed to pocketable (although im not sure if this is in use outside of VED I still added the change here since the file exists in VE as well).

This also adds to every CT script the var_arm64 variable, which will allow for preventing the script from running or allowing the script to run based on this variable (see #12639).

🔗 Related Issue

Related to #12639

✅ Prerequisites (X in brackets)

• Self-review completed – Code follows project standards.
• Tested thoroughly – Changes work as expected.
• No security risks – No hardcoded secrets, unnecessary privilege escalations, or permission issues.

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🛠️ Type of Change (X in brackets)

• 🐞 Bug fix – Resolves an issue without breaking functionality.
• ✨ New feature – Adds new, non-breaking functionality.
• 💥 Breaking change – Alters existing functionality in a way that may require updates.
• 🆕 New script – A fully functional and tested script or script set.
• 🌍 Website update – Changes to script metadata (PocketBase/website data).
• 🔧 Refactoring / Code Cleanup – Improves readability or maintainability without changing functionality.
• 📝 Documentation update – Changes to README, AppName.md, CONTRIBUTING.md, or other docs.