Update deferred array return type hinting

Zebedee Nichollsrequested to merge
improve-deferred-shape-array-type-hinting into main

Description

A temporary workaround to allow !120 (merged), given that !121 is not as easy as expected

Checklist

Please confirm that this pull request has done the following:

  • Tests added
  • Documentation added (where applicable)
  • Changelog item added to changelog/
Edited by Zebedee Nicholls

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