update package presence checks to use macros

[richgt]

Description

Type of PR

What kind of change is this?

• [x] refactor
• [ ] internal bugfix
• [ ] user-facing bugfix
• [ ] new feature
• [ ] deprecation
• [ ] documentation
• [ ] something else (please describe)
• [ ] tests

Notes for the release

Does this PR need to be described in the Ember release blog post? Please briefly describe what should be shared.

Updated package presence checks to use use macros instead of simple has checks.