Backport v0.37 [Bootstrap] Fix duplication detection in root block finalization

[zhangchiqing]

Backport #6484

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 43.75000% with 9 lines in your changes missing coverage. Please review.

Project coverage is 41.43%. Comparing base (ae4ce43) to head (c245fd9).
Report is 80 commits behind head on v0.37.

Files with missing lines	Patch %	Lines
cmd/bootstrap/cmd/final_list.go	0.00%	4 Missing ⚠️
cmd/bootstrap/cmd/finalize.go	66.66%	2 Missing and 1 partial ⚠️
cmd/bootstrap/cmd/rootblock.go	33.33%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            v0.37    #6485   +/-   ##
=======================================
  Coverage   41.43%   41.43%           
=======================================
  Files        2017     2017           
  Lines      144019   144057   +38     
=======================================
+ Hits        59678    59694   +16     
- Misses      78137    78153   +16     
- Partials     6204     6210    +6     

Flag	Coverage Δ
unittests	41.43% <43.75%> (+<0.01%)	⬆️

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[AlexHentschel]

thanks for the backport