add 'path' param to getfiledestinations

[orichters]

• to be able to run it with gms::getfiledestinations(path = "../..") in the tests

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 41.41%. Comparing base (842c8b7) to head (a656019).

Files	Patch %	Lines
R/getfiledestinations.R	0.00%	4 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #88   +/-   ##
=======================================
  Coverage   41.41%   41.41%           
=======================================
  Files          51       51           
  Lines        1671     1671           
=======================================
  Hits          692      692           
  Misses        979      979           

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