refactor: filecollector into new package

[ChristopherHX]

To be able to reuse this logic across packages it makes sense for me to export it and move this into a new package.

This helps to remove the copy of filecollector in #2155

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ EDITORCONFIG	editorconfig-checker	5		0	0.02s
✅ REPOSITORY	gitleaks	yes		no	2.3s
✅ REPOSITORY	git_diff	yes		no	0.17s
✅ REPOSITORY	grype	yes		no	7.39s
✅ REPOSITORY	secretlint	yes		no	1.21s
✅ REPOSITORY	trivy-sbom	yes		no	0.63s
✅ REPOSITORY	trufflehog	yes		no	7.24s

See detailed report in MegaLinter reports
Set VALIDATE_ALL_CODEBASE: true in mega-linter.yml to validate all sources, not only the diff

MegaLinter is graciously provided by

[codecov]

Codecov Report

Attention: 11 lines in your changes are missing coverage. Please review.

Comparison is base (4ca35d2) 60.97% compared to head (43b091b) 61.56%.

Files	Patch %	Lines
pkg/filecollector/file_collector.go	25.00%	6 Missing ⚠️
pkg/container/docker_run.go	0.00%	4 Missing ⚠️
pkg/container/host_environment.go	90.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2174      +/-   ##
==========================================
+ Coverage   60.97%   61.56%   +0.58%     
==========================================
  Files          53       53              
  Lines        9002     9002              
==========================================
+ Hits         5489     5542      +53     
+ Misses       3074     3020      -54     
- Partials      439      440       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[mergify]

@ChristopherHX this pull request has failed checks 🛠

[ChristopherHX]

After updating the codecov base via workflow_dispatch, this PR has been flagged until I added tests to increase diff coverage of existing code