BED-4526 chore: bootstrap graph db in migration test

[mistahj67]

Description

Added necessary graph migration to the prepare step for integration framework

Motivation and Context

This PR addresses: BED-4526

Why is this change required? What problem does it solve?
Needed for a change in BHE

How Has This Been Tested?

Unit tests pass

Types of changes

• Chore (a change that does not modify the application functionality)

Checklist:

• I have met the contributing prerequisites
  • Assigned myself to this PR
  • Added the appropriate labels
  • Associated an issue: Issues and Pull Requests README #672
  • Read the Contributing guide: https://github.com/SpecterOps/BloodHound/wiki/Contributing
• I have ensured that related documentation is up-to-date
  • Open API docs
  • Code comments (GoDocs / JSDocs)
• I have followed proper test practices
  • Added/updated tests to cover my changes
  • All new and existing tests passed