cmd: testnet flags precedence

[pinebit]

Custom testnet flags to take precedence over the default "mainnet" network value.

category: bug
ticket: none

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 56.66%. Comparing base (33fe701) to head (e6ca92a).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
cmd/createdkg.go	0.00%	1 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4266      +/-   ##
==========================================
+ Coverage   56.61%   56.66%   +0.05%     
==========================================
  Files         237      237              
  Lines       31329    31332       +3     
==========================================
+ Hits        17736    17754      +18     
+ Misses      11320    11309      -11     
+ Partials     2273     2269       -4     

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud