test: add nydus e2e testing for API v2

[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

All modified and coverable lines are covered by tests ✅

Project coverage is 52.72%. Comparing base (8927d60) to head (baf40eb).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3234      +/-   ##
==========================================
- Coverage   52.84%   52.72%   -0.12%     
==========================================
  Files         192      192              
  Lines       20360    20372      +12     
==========================================
- Hits        10759    10741      -18     
- Misses       8802     8824      +22     
- Partials      799      807       +8     

Flag	Coverage Δ
unittests	52.72% <ø> (-0.12%)	⬇️

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see 6 files with indirect coverage changes