feat: add support for configmap and secret replication in agent env

[danielstokes]

Description

Add support for configmap and secret replication in agent env valueFrom. Still needs tests. Needs slight code change to remove the type assertion added so that tests would pass.

Type of change

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

Checklist:

• [ ] Documentation has been updated
• [ ] This change requires changes in testing:
  • [ ] unit tests
  • [ ] E2E tests