Replace vcpkg with vendor-built libxml2 for CLI

[CodeJhF]

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.85%. Comparing base (7eb175c) to head (b7a803e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3305   +/-   ##
=======================================
  Coverage   74.84%   74.85%           
=======================================
  Files         501      501           
  Lines       32765    32765           
  Branches    10701    10701           
=======================================
+ Hits        24523    24526    +3     
  Misses       6051     6051           
+ Partials     2191     2188    -3     

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