test: delayed checking Seed Peer download content

[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 52.77%. Comparing base (710f9f3) to head (4785344).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##           main    #3230       +/-   ##
=========================================
+ Coverage      0   52.77%   +52.77%     
=========================================
  Files         0      192      +192     
  Lines         0    20341    +20341     
=========================================
+ Hits          0    10734    +10734     
- Misses        0     8803     +8803     
- Partials      0      804      +804     

Flag	Coverage Δ
unittests	52.77% <ø> (?)

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see 192 files with indirect coverage changes