Remove ganache-cli related code from API & tests

[cgewecke]

• Remove ganache-cli dev dep

• Remove detect-port dep

• Remove ganache client related code

• Remove ganache related docs

• Update API docs with attachToHardhat example

• Throw error when --network flag is used

TO DO

• Look into coverage drop (probably ratio issue)

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (6739db6) 95.85% compared to head (fcfb966) 95.91%.

Files	Patch %	Lines
plugins/resources/nomiclabs.utils.js	80.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #849      +/-   ##
==========================================
+ Coverage   95.85%   95.91%   +0.06%     
==========================================
  Files          19       19              
  Lines        1061      980      -81     
==========================================
- Hits         1017      940      -77     
+ Misses         44       40       -4     

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