excavate target parameter extraction / new tests

[liquidsec]

The ability to extract parameters from the target URL itself was added, along with tests to support this. Other tests were added to support excavates querystring retain option.

Also, turning off some excavate operations when parameter extraction is not enabled to save CPU.

[codecov]

Codecov Report

Attention: Patch coverage is 98.59155% with 1 line in your changes missing coverage. Please review.

Project coverage is 93%. Comparing base (aa949b0) to head (1fc9b9e).

Files	Patch %	Lines
...t/test_step_2/module_tests/test_module_excavate.py	99%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           bbot-2.0   #1537   +/-   ##
========================================
+ Coverage        93%     93%   +1%     
========================================
  Files           347     347           
  Lines         25150   25217   +67     
========================================
+ Hits          23151   23221   +70     
+ Misses         1999    1996    -3     

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