Add OIIO_NODISCARD to ImageInput create/open/read methods#5111

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mvanhorn wants to merge 2 commits intoAcademySoftwareFoundation:mainfrom

mvanhorn:osc/4781-nodiscard-imageinput

Commits on Apr 8, 2026

Add two-tier OIIO_NODISCARD for ImageInput methods
mvanhorn
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Address review feedback: version-gated NODISCARD_ERROR, fix behavioral changes
mvanhorn
committed