[Plugin Framework] TestBasicInvoke test failing on master

[t0yv0]

What happened?

Something bit-rotted in the tests for Plugin Framework.

With pulumi/pulumi#11753 Outputs is deprecated in favor of ReturnType, which triggers a panic in TestBasicInvoke trying to access the Outputs field.

Should be a quick fix.

Expected Behavior

tests pass

Steps to reproduce

TestBasicInvoke failing

Output of pulumi about

N/A

Additional context

No response

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