Fix OpenEXR3 compatibility (raises minimum version) and use upstream's CMake Config#41

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a17r wants to merge 2 commits intoOpenMW:3.6from

a17r:openexr3config

Commits on Jan 22, 2026

Fix build with OpenEXR 3 and use upstream OpenEXR CMake Config

DarthGandalf
authored and
a17r
committed
Drop obsolete local FindOpenEXR.cmake and Findilmbase.cmake
a17r
committed