MTV-1858 | Remove vm preference temporarily

[mnecas]

Issue:
With older version of the Kubevirt migrating specific windows version the preference always sets BIOS and if we set the UEFI the creation fails.

Quick fix:
Remove the preference usage.

ref: MTV-1858 CNV-49381

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 0% with 10 lines in your changes missing coverage. Please review.

Project coverage is 15.45%. Comparing base (3113e86) to head (9441f55).

Files with missing lines	Patch %	Lines
pkg/controller/plan/kubevirt.go	0.00%	10 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1303      +/-   ##
==========================================
- Coverage   15.50%   15.45%   -0.05%     
==========================================
  Files         112      112              
  Lines       23377    23375       -2     
==========================================
- Hits         3624     3613      -11     
- Misses      19466    19477      +11     
+ Partials      287      285       -2     

Flag	Coverage Δ
unittests	15.45% <0.00%> (-0.05%)	⬇️

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[yaacov]

this fix is until CNV-49381 is fixed on CNV side ?