fix: change vbench dependency to exclude macos

[begumcig]

Description

VBench bencmarking suite depends on decord to read video frames, which doesn't have a package for MacOS

Related Issue

Fixes #(issue number)

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

Additional Notes

[gsprochette]

Looks perfect, thanks for taking the time to identify and catch the ModuleNotFoundError. I assume there will be some sort of warning on pip install vbench for MacOS users, or at least a quick resolution of this sys_platform != 'darwin' :)