Fix codegen crash on nullable lists of non-scalars #11308

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4 errors

Canceling since a higher priority waiting request for 'codegen-optional-list' exists

Process completed with exit code 1.

The operation was canceled.

Codecov: Failed to properly upload report: The process 'D:\a\_actions\codecov\codecov-action\v4\dist\codecov.exe' failed with exit code 1