Add e2e coverage analysis

[Vacant2333]

What this PR does / why we need it:
Add features e2e test coverage details
issue: #3685

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov-commenter]

Codecov Report

Merging #3928 (c1d82ba) into master (37cee8d) will decrease coverage by 0.02%.
Report is 4 commits behind head on master.
The diff coverage is n/a.

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@@            Coverage Diff             @@
##           master    #3928      +/-   ##
==========================================
- Coverage   54.72%   54.71%   -0.02%     
==========================================
  Files         229      229              
  Lines       22065    22074       +9     
==========================================
+ Hits        12076    12077       +1     
- Misses       9343     9351       +8     
  Partials      646      646              

Flag	Coverage Δ
unittests	54.71% <ø> (-0.02%)	⬇️

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see 2 files with indirect coverage changes

[XiShanYongYe-Chang]

Thanks~
/assign

[XiShanYongYe-Chang]

Thanks~
/lgtm
/approve

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: XiShanYongYe-Chang

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[XiShanYongYe-Chang]

/kind cleanup