[5.3.7] when using ember-cli-mirage `ember-inflector` must be a installed, otherwise production build is broken about data

[runspired]

I looked at the pnpm lockfile in power-select for the commit prior to you adding ember-inflector in as a dependency. The problem is that ember-inflector is installed by mirage, but then the addon deactivates itself in production. Deactivated addons won't have their dependent addons included in the build; however, they are still installed and so still visible to embroider/macros (cc @mansona @NullVoxPopuli and @ef4 who probably already know this nuance but just to surface an odd edge case with classic+macros)

I'd argue that the correct thing here is for power-select to do exactly as it did and put ember-inflector in its dev-deps.

You can see mirage is what brings the library here: https://github.com/cibernox/ember-power-select/blob/734c21825204f45dc7f7aca776d3e4abfcffaba3/pnpm-lock.yaml#L7452

[runspired]

you'll want to run pnpm why -r ember-inflector to figure out why it was available even when not ostensibly installed. It's likely another dependency is bringing it in a way that makes it visible to node resolution but not included in the app assets