cluster: create draft 1.5 definition

[LukeHackett12]

Adds a new 1.5 cluster definition version with individual fee recipients and withdrawal addresses per validator. This PR is only to add these fields, not use them for now.

category: feature
ticket: #1645

[codecov]

Codecov Report

Base: 54.55% // Head: 54.48% // Decreases project coverage by -0.07% ⚠️

Coverage data is based on head (810a560) compared to base (e412352).
Patch coverage: 74.32% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1674      +/-   ##
==========================================
- Coverage   54.55%   54.48%   -0.07%     
==========================================
  Files         158      158              
  Lines       20233    20484     +251     
==========================================
+ Hits        11038    11161     +123     
- Misses       7735     7837     +102     
- Partials     1460     1486      +26     

Impacted Files	Coverage Δ
cmd/createcluster.go	52.65% <30.00%> (-0.50%)	⬇️
dkg/dkg.go	53.86% <33.33%> (-0.26%)	⬇️
app/app.go	63.78% <57.14%> (-0.29%)	⬇️
cluster/ssz.go	75.06% <68.46%> (-4.06%)	⬇️
cluster/definition.go	68.19% <82.75%> (+2.35%)	⬆️
cluster/lock.go	58.10% <100.00%> (ø)
cluster/version.go	100.00% <100.00%> (ø)
core/qbft/qbft.go	73.73% <0.00%> (-10.09%)	⬇️
app/vmock.go	73.05% <0.00%> (-1.04%)	⬇️
... and 3 more

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