Add combined case 3 in the lazy activation policy tests

[Affan-7]

What type of PR is this?
/kind cleanup

What this PR does / why we need it:
For better test coverage.

Which issue(s) this PR fixes:
Part of the #4607

Does this PR introduce a user-facing change?:

NONE

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 28.23%. Comparing base (049ddc6) to head (8f1b112).
Report is 14 commits behind head on master.

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Additional details and impacted files

@@             Coverage Diff             @@
##           master    #5033       +/-   ##
===========================================
- Coverage   53.33%   28.23%   -25.11%     
===========================================
  Files         253      632      +379     
  Lines       20558    43435    +22877     
===========================================
+ Hits        10965    12262     +1297     
- Misses       8867    30279    +21412     
- Partials      726      894      +168     

Flag	Coverage Δ
unittests	28.23% <ø> (-25.11%)	⬇️

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[RainbowMango]

/assign @chaosi-zju

[chaosi-zju]

Hi @Affan-7, thank you for your work~

[chaosi-zju]

/lgtm

CC @RainbowMango

[RainbowMango]

Thanks @Affan-7, Hope you are doing fine.
/assign @XiShanYongYe-Chang

[XiShanYongYe-Chang]

Thanks @Affan-7
/approve

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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