fix: correct union type code generation for list members

[a-hilaly]

Fix code generation for union types with list members (e.g []*string) that was incorrectly trying to dereference the constructed slice and assign directly to non-existent interface fields.

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[a-hilaly]

Just hacking around - not ready for a review.

[a-hilaly]

/retest

[ack-prow]

@a-hilaly: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
verify-attribution	f255177	link	false	/test verify-attribution
s3-olm-test	f255177	link	false	/test s3-olm-test

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[a-hilaly]

@knottnt @rushmash91 can you please take a look?

[knottnt]

/hold

Adding hold for unit tests. Assuming there is a AWS service that requires these changes for a CRD to be generated correctly. Should add it to test data with a minimal generator.yaml recreating the necessary field config.

[a-hilaly]

/unhold

[michaelhtm]

/lgtm

[ack-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: a-hilaly, michaelhtm

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