Add removal of pvc in the end of spec test

[horecoli]

Description

In one of shared DB spec tests was missing removal of pvc which was created during cnf setup. This change adds this removal.

Issues:

Refs: #2017

How has this been tested:

• [ ] Covered by existing integration testing
• [ ] Added integration testing to cover
• [ ] Verified all A/C passes
  • [ ] develop
  • [ ] master
  • [ ] tag/other branch
• [ ] Test environment
  • [ ] Shared Packet K8s cluster
  • [ ] New Packet K8s cluster
  • [ ] Kind cluster
• [ ] Have not tested

Types of changes:

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Documentation update

Checklist:

Documentation

• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] No updates required.

Code Review

• [ ] Does the test handle fatal exceptions, ie. rescue block

Issue

• [ ] Tasks in issue are checked off