object-inspector-test: fix legacy-attribute-arguments issue (#1991)
object-inspector-test: fix legacy-attribute-arguments issue (#1991)

Right now, when we run the 'Views are correctly handled when destroyed
during transitions' test from the 'Ember Debug - Object Inspector'
suite, there is a deprecation logged along the lines of:

    Passing the `@class` argument to <Input> is deprecated. Instead,
    please pass the attribute directly, i.e. `<Input class={{...}} />`
    instead of `<Input @class={{...}} />` or `{{input class=...}}`.

Let's fix this deprecation by preferring angle bracket syntax for the
input component. This will help avoid having an unnecessary deprecation
show up in the test output.
emberjs/ember-inspector,emberjs/ember-inspector