openimageio: build with openexr 3

ilmbase is replaced by Imath (propagated from openexr_3)

See the following upstream change from 2020 on OpenEXR 3.x support: https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/6313484e35765df1adf8f40c217cebc4c9d9d954#diff-40f1f520160b8fecd67891ee24b54add91856f733ece4bae0c3896adb00452af

pkgs/development/libraries/openimageio/default.nix

···
 , boost
 , cmake
 , giflib
-, ilmbase
 , libjpeg
 , libpng
 , libtiff
···
   buildInputs = [
     boost
     giflib
-    ilmbase
     libjpeg
     libpng
     libtiff

pkgs/top-level/all-packages.nix

···
 
   openfx = callPackage ../development/libraries/openfx { };
 
-  openimageio = darwin.apple_sdk_11_0.callPackage ../development/libraries/openimageio { };
+  openimageio = darwin.apple_sdk_11_0.callPackage ../development/libraries/openimageio {
+    openexr = openexr_3;
+  };
 
   openjump = callPackage ../applications/misc/openjump { };