Update NVIDIA Driver Version and Add SSD Boot Flexibility to Host Install Guide

[hdnh2006]

This PR updates the host install guide for Vast.ai with the following key changes:

1. NVIDIA Driver Upgrade:

   • Updated the NVIDIA driver version from nvidia-driver-560 to nvidia-driver-570 to ensure compatibility with newer hardware.
   • Added a note to use nvidia-driver-570-open for Blackwell architecture GPUs, providing clarity for users with specific hardware.

2. Improved Disk Partitioning Guidance:

   • Added a comment emphasizing the importance of proper NVMe disk partitioning and XFS formatting to avoid potential boot issues.

3. Enhanced Installation Flexibility:

   • Introduced a new install command with the --no-partitioning flag, allowing users to boot directly from an SSD without manual partitioning steps. This simplifies the workflow for SSD-based setups.

4. Minor Documentation Improvements:

   • Clarified comments in the script for better readability and user guidance.

These updates improve compatibility, reduce potential user errors, and offer greater flexibility for different hardware configurations. Let me know if further adjustments are needed!