CySQL Fix Poor Type Negotiation for []graph.ID Parameters

[zinic]

Description

This prevents the possibility of missing nodes causing a panic in caching logic for traversal.

Motivation and Context

Seeing this happen in two large environments. This also cleans up caching logic that could panic.

How Has This Been Tested?

Integration test coverage.

Types of changes

• Bug fix (non-breaking change which fixes an issue)

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