Increase OS disk size from 30GB to 60GB

[anson627]

What type of PR is this? /kind chores

What this PR does / why we need it: unblock gb200 build

Which issue(s) this PR fixes:

Fixes #

Requirements:

• [ ] uses conventional commit messages
• [ ] includes documentation
• [ ] adds unit tests
• [ ] tested upgrade from previous version
• [ ] commits are GPG signed and Github marks them as verified

Special notes for your reviewer:

Release note:

none