Update round per epoch supernova

[miiu96]

Reasoning behind the pull request

• Changed the number of rounds per epoch for supernova in chain simulator integration tests

Pre-requisites

Based on the Contributing Guidelines the PR author and the reviewers must check the following requirements are met:

• was the PR targeted to the correct branch?
• if this is a larger feature that probably needs more than one PR, is there a feat branch created?
• if this is a feat branch merging, do all satellite projects have a proper tag inside go.mod?

The base branch was changed.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.53%. Comparing base (f1e38cc) to head (4f391b1).
⚠️ Report is 4 commits behind head on feat/testnet-fixes.

Additional details and impacted files

@@                  Coverage Diff                   @@
##           feat/testnet-fixes    #7849      +/-   ##
======================================================
- Coverage               77.54%   77.53%   -0.01%     
======================================================
  Files                     883      883              
  Lines                  124506   124506              
======================================================
- Hits                    96552    96540      -12     
- Misses                  21543    21552       +9     
- Partials                 6411     6414       +3     

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