docs(gpu-sharing): add verification commands to GPU sharing documentation

[rich7420]

Description

This PR enhances the GPU sharing documentation by adding verification and check commands alongside existing kubectl apply commands. Previously, the documentation only provided commands to create resources but lacked instructions for verifying the configuration and status of GPU sharing pods.

Related Issues

Fixes #

Checklist

Note: Ensure your PR title follows the Conventional Commits format (e.g., feat(scheduler): add new feature)

• Self-reviewed
• Added/updated tests (if needed)
• Updated documentation (if needed)

Breaking Changes

Additional Notes