cmd: refactor create cluster to use keymanager package

[xenowits]

Refactors create cluster to use the new keymanager package.

category: refactor
ticket: #1503

[codecov]

Codecov Report

Base: 54.45% // Head: 54.63% // Increases project coverage by +0.18% 🎉

Coverage data is based on head (47a5f81) compared to base (714e7f7).
Patch coverage: 72.72% of modified lines in pull request are covered.

❗ Current head 47a5f81 differs from pull request most recent head fbcf0da. Consider uploading reports for the commit fbcf0da to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1662      +/-   ##
==========================================
+ Coverage   54.45%   54.63%   +0.18%     
==========================================
  Files         157      157              
  Lines       20024    20028       +4     
==========================================
+ Hits        10904    10943      +39     
+ Misses       7667     7636      -31     
+ Partials     1453     1449       -4     

Impacted Files	Coverage Δ
eth2util/keystore/keystore.go	48.64% <ø> (+5.44%)	⬆️
cmd/createcluster.go	53.15% <72.72%> (+<0.01%)	⬆️
core/consensus/transport.go	64.58% <0.00%> (-0.70%)	⬇️
app/vmock.go	74.09% <0.00%> (ø)
core/qbft/qbft.go	83.40% <0.00%> (ø)
core/priority/prioritiser.go	61.69% <0.00%> (+2.82%)	⬆️
eth2util/enr/enr.go	72.51% <0.00%> (+16.96%)	⬆️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.