Improve ssh key handling

[johnalotoski]

Overview:

Improve ssh key handling and edge cases, resolve misc issues, add IOPS and throughput gp3 openTofu support

Details:

• Update auth-keys-hub for more assertions and warns on edge case configuration
• Update inputs for the IntersectMBO migration
• Enable local sysstat metrics collection at high resolution in the common nixos profile
• Switch to sops-nix systemd restart/reload secrets hook which is now preferred over the custom sops-secrets hook
• Fix dashboard panels and adjust alerts
• Fix bootstrap key use in the default ssh config for those not using an SSH/GPG agent
• Fix tofu create-all prompt on pre-existing resources
• Add EBS gp3 IOPS and throughput tofu support
• Add a machine bootstrap key auto-expiration service to transition to auth-keys-hub use gracefully