refactor(devnet): remove dev accounts from live config

[al3mart]

Removes dev accounts from pop-runtime-devnet genesis config using a similar configuration than testnet for now.

We might want to update collator keys.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 11 lines in your changes missing coverage. Please review.

Project coverage is 74.66%. Comparing base (975e0b1) to head (c1a5fc1).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
runtime/devnet/src/genesis.rs	0.00%	11 Missing ⚠️

@@            Coverage Diff             @@
##             main     #487      +/-   ##
==========================================
- Coverage   74.69%   74.66%   -0.03%     
==========================================
  Files          98       98              
  Lines       19424    19430       +6     
  Branches    19424    19430       +6     
==========================================
  Hits        14508    14508              
- Misses       4649     4655       +6     
  Partials      267      267              

Files with missing lines	Coverage Δ
runtime/devnet/src/genesis.rs	0.00% <0.00%> (ø)

[al3mart]

Closing in favor of: #490