Fixed MONSTER BERE Function Implementation and Expanded MONSTER Testing

[taraeicher]

• Removed redundant code implementing BERE function to compute MONSTER transition matrix (MONSTER BERE Estimation Returns Empty Correlation Matrix in buildNet Mode #377).
• Removed options for unimplemented GRN computation methods in buildNet mode.
• Removed unnecessary logging messages which make the code more difficult to debug during build. Added option to enable or disable logging.
• Expanded MONSTER testing to ensure that various combinations of inputs run without error in both regNet and buildNet mode.

[codecov]

Codecov Report

❌ Patch coverage is 62.79070% with 48 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.70%. Comparing base (f84c392) to head (aa635f9).
⚠️ Report is 6 commits behind head on devel.

Files with missing lines	Patch %	Lines
R/MONSTER.R	62.79%	48 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            devel     #384      +/-   ##
==========================================
+ Coverage   57.62%   59.70%   +2.08%     
==========================================
  Files          21       21              
  Lines        3530     3507      -23     
==========================================
+ Hits         2034     2094      +60     
+ Misses       1496     1413      -83     

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