cmd: add --definition-file flag to create cluster command

[xenowits]

Refactors charon create cluster command to fetch partial (solo-flow) cluster definition and use it for creating cluster outputs.

category: feature
ticket: #1490

[codecov]

Codecov Report

Base: 54.14% // Head: 54.23% // Increases project coverage by +0.08% 🎉

Coverage data is based on head (0894aec) compared to base (febb425).
Patch coverage: 35.29% of modified lines in pull request are covered.

❗ Current head 0894aec differs from pull request most recent head 08e9722. Consider uploading reports for the commit 08e9722 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1558      +/-   ##
==========================================
+ Coverage   54.14%   54.23%   +0.08%     
==========================================
  Files         157      154       -3     
  Lines       19711    19557     -154     
==========================================
- Hits        10673    10606      -67     
+ Misses       7590     7514      -76     
+ Partials     1448     1437      -11     

Impacted Files	Coverage Δ
cluster/definition.go	60.14% <0.00%> (ø)
cluster/lock.go	58.10% <ø> (ø)
cluster/test_cluster.go	81.11% <3.57%> (-18.89%)	⬇️
cmd/createcluster.go	47.43% <47.14%> (+0.62%)	⬆️
dkg/disk.go	55.63% <50.00%> (ø)
cluster/helpers.go	59.64% <100.00%> (ø)
app/vmock.go	72.53% <0.00%> (-5.19%)	⬇️
app/monitoringapi.go	77.00% <0.00%> (-3.00%)	⬇️
p2p/bootnode.go	20.53% <0.00%> (-2.68%)	⬇️
app/peerinfo/peerinfo.go	51.26% <0.00%> (-1.27%)	⬇️
... and 11 more

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[xenowits]

Closing this in favour of #1615