Upgrade direct dep rand to 0.9.0

[YJDoc2]

Description

This takes over from #3061, and fixes the lint and other compilation issues.

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Performance improvement
• Test updates
• CI/CD related changes
• Other : Dep update

Testing

• Added new unit tests
• Added new integration tests
• Ran existing test suite
• Tested manually (please provide steps)

Related Issues

N/A , just dep update

Additional Context

N/A

[YJDoc2]

I'm going ahead and merging this, as it is sort-of blocking other dep update prs, which are piling up. The main changes are -

1. upgrade rand crate to 0.9.0 ; the only changes we are affected by are naming changes, eg thread_rng->rng , gen_range->random_range etc. The behavior should be still the same.
2. Changed CI for cargo-machete due to Why does Github action installs the latest version? bnjbvr/cargo-machete#156 ; the only effect is instead of upstream action, we use taiki-e to install and run. Otherwise no difference.

Going ahead and merging as all CI passes. cc @youki-dev/youki