feat: add difference function for slices

[gaius-qi]

Description

Related Issue

Motivation and Context

Screenshots (if appropriate)

Types of changes

• 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 change)
• Documentation Update (if none of the other choices apply)

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[codecov]

Codecov Report

Attention: 19 lines in your changes are missing coverage. Please review.

Comparison is base (b9c25f8) 51.00% compared to head (21ec206) 50.94%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2984      +/-   ##
==========================================
- Coverage   51.00%   50.94%   -0.06%     
==========================================
  Files         162      162              
  Lines       22340    22350      +10     
==========================================
- Hits        11395    11387       -8     
- Misses      10284    10304      +20     
+ Partials      661      659       -2     

Flag	Coverage Δ
Object-compatibility-e2etests	?
e2etests	?
unittests	50.94% <5.00%> (-0.06%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
scheduler/networktopology/network_topology.go	100.00% <100.00%> (ø)
pkg/slices/slices.go	57.69% <0.00%> (-42.31%)	⬇️

... and 2 files with indirect coverage changes