testutil/compose: add feature set flags

[corverroos]

Adds the ability to enable different feature sets to compose.

Also fix issue with teku vc config.

category: feature
ticket: #568

[codecov]

Codecov Report

Merging #607 (62f5e45) into main (858032a) will decrease coverage by 0.02%.
The diff coverage is 92.30%.

@@            Coverage Diff             @@
##             main     #607      +/-   ##
==========================================
- Coverage   56.35%   56.33%   -0.03%     
==========================================
  Files          96       96              
  Lines        9083     9106      +23     
==========================================
+ Hits         5119     5130      +11     
- Misses       3230     3236       +6     
- Partials      734      740       +6     

Impacted Files	Coverage Δ
testutil/compose/define.go	40.32% <0.00%> (ø)
testutil/compose/lock.go	59.57% <66.66%> (+0.43%)	⬆️
testutil/compose/config.go	83.33% <100.00%> (ø)
testutil/compose/run.go	88.13% <100.00%> (+7.05%)	⬆️
app/app.go	58.20% <0.00%> (-2.57%)	⬇️
core/qbft/qbft.go	82.13% <0.00%> (-0.44%)	⬇️

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[xenowits]

Looks good!