Add real acceptance test following implementation of sigstore-go verification for policies and complypacks

[hbraswelrh]

Description

Once the PR #667 is merged, the PR #670 work that implemented sigstore-go verification of policies and complypacks will need an acceptance test added.

Related Issues

• Merge of PR test(complytime): add tests for utility functions and duplicate policy validation #667
• Pr feat: implement sigstore-go verification for policies and complypacks #670