fix(vm): Don't add an extra hostpci entry

[qazbnm456]

When I try to clone from a template with no hostpci in the config, the post body would contain an extra hostpci because of these lines (from DefaultFunc).

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[codecov-commenter]

Codecov Report

Base: 11.20% // Head: 11.21% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (e3b7225) compared to base (11fe9e5).
Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #223   +/-   ##
=======================================
  Coverage   11.20%   11.21%           
=======================================
  Files          54       54           
  Lines       11726    11716   -10     
=======================================
  Hits         1314     1314           
+ Misses      10386    10376   -10     
  Partials       26       26           

Impacted Files	Coverage Δ
proxmoxtf/resource_virtual_environment_vm.go	1.92% <0.00%> (+<0.01%)	⬆️

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[bpg]

Caused by #194

[bpg]

Hey @qazbnm456, thanks for the fix!