fix: extract validator pubkeys from genesis

[dvdplm]

Refactor extraction of validators from the genesis file.

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (705b97e) 60.52% compared to head (0d9983b) 60.50%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #325      +/-   ##
==========================================
- Coverage   60.52%   60.50%   -0.03%     
==========================================
  Files         225      225              
  Lines       12049    12058       +9     
==========================================
+ Hits         7293     7296       +3     
- Misses       4756     4762       +6     

Files	Coverage Δ
crates/topos/src/config/genesis/mod.rs	96.00% <94.44%> (+0.22%)	⬆️

... and 8 files with indirect coverage changes

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[gruberb]

Is there a reasoning behind this refactor?

[gruberb]

LGTM, although personally I like the previous version, it's slightly easier to follow and understand.

[dvdplm]

Is there a reasoning behind this refactor?

Not really, nothing beyond me reading code trying to fix a different problem and fixing a few warts and unneeded allocations.