feat(snaps-utils): Allow overriding allowed protocols in validateLink

[legobeat]

By popular request, allow specifying custom protocols for link validation.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.27%. Comparing base (86afbcb) to head (f87425a). Report is 1 commits behind head on main.

:exclamation: Current head f87425a differs from pull request most recent head d066a8c

Please upload reports for the commit d066a8c to get more accurate results.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2411   +/-   ##
=======================================
  Coverage   94.27%   94.27%           
=======================================
  Files         435      435           
  Lines        8942     8942           
  Branches     1374     1376    +2     
=======================================
  Hits         8430     8430           
  Misses        512      512           

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[FrederikBolding]

@legobeat What is the use-case here? 🤔