Github workflows : Import OCIO environment variable for tests on Windows

- Recent versions of `OpenImageIO` corrupt data during color conversion with built-in conversions. Using `OpenColorIO` fixes color conversion.

Author: ericmehl

.github/workflows/main.yml

@@ -182,6 +182,7 @@ jobs:
         scons ${{ matrix.tests }} BUILD_TYPE=${{ matrix.buildType }} OPTIONS=${{ matrix.options }} BUILD_CACHEDIR=sconsCache
       env:
         IECORE_RTLD_GLOBAL: 0
+        OCIO: ${{ env.CORTEX_BUILD_NAME }}/openColorIO/config.ocio
 
     - name: Build Package
       run: |

.github/workflows/main/options.windows

@@ -70,5 +70,5 @@ WARNINGS_AS_ERRORS = "1"
 
 # PATH is needed to locate the MSVC compiler. PROCESSOR_ARCHITECTURE and USERNAME
 # are needed by the HeaderGenerator and accompanying tests.
-ENV_VARS_TO_IMPORT = "PATH PROCESSOR_ARCHITECTURE USERNAME CI"
+ENV_VARS_TO_IMPORT = "PATH PROCESSOR_ARCHITECTURE USERNAME CI OCIO"