As part of the Podman 6 release, we need to make libkrun the default machine provider for Apple Silicon (M1/M2/M3) Macs. This change will provide better performance and integration for macOS users on ARM-based hardware.

This story involves:

• Updating the default provider configuration to use libkrun on Apple Silicon
• Updating documentation to reflect the new default provider
• Updating tests to validate libkrun as the default on Apple Silicon

Reference: Podman 6 High Level Design