feat(merged-mining): configure new max merkle path length on mainnet

[jansegre]

Motivation

We're ready to introduce this upgrade on the mainnet.

Acceptance Criteria

• Set up the max-merkle-path increase on the mainnet

Checklist

• If you are requesting a merge into master, confirm this code is production-ready and can be included in future releases as soon as it gets merged

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.91%. Comparing base (e947404) to head (70fd351).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1032      +/-   ##
==========================================
- Coverage   84.94%   84.91%   -0.04%     
==========================================
  Files         297      297              
  Lines       22910    22910              
  Branches     3464     3464              
==========================================
- Hits        19462    19453       -9     
- Misses       2766     2773       +7     
- Partials      682      684       +2     

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