refactor: remove sbom view files property from packager

[phillebaba]

Description

Removes the sbom view fiels struct property.

Related Issue

Part of #2694

Checklist before merging

• Test, docs, adr added or updated as needed
• Contributor Guide Steps followed

[netlify]

✅ Deploy Preview for zarf-docs canceled.

Name	Link
🔨 Latest commit	7ccbfef
🔍 Latest deploy log	https://app.netlify.com/sites/zarf-docs/deploys/6685138cb99ae100082a2888

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.

Project coverage is 19.00%. Comparing base (43e50bb) to head (7ccbfef).

Files	Patch %	Lines
src/pkg/packager/interactive.go	0.00%	6 Missing ⚠️
src/pkg/packager/create.go	0.00%	1 Missing ⚠️
src/pkg/packager/deploy.go	0.00%	1 Missing ⚠️
src/pkg/packager/mirror.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2695   +/-   ##
=======================================
  Coverage   19.00%   19.00%           
=======================================
  Files         170      170           
  Lines       12199    12197    -2     
=======================================
  Hits         2318     2318           
+ Misses       9595     9593    -2     
  Partials      286      286           

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