ci: Add Windows 2025 w/ MSVS 2026 job variant to CI (#2093)

ci: Add Windows 2025 w/ MSVS 2026

Signed-off-by: Larry Gritz <lg@larrygritz.com>

Author: lgritz

.github/workflows/ci.yml

@@ -649,8 +649,8 @@ jobs:
                             OpenImageIO_BUILD_MISSING_DEPS="Freetype;TIFF;libdeflate;libjpeg-turbo"
                             LLVM_GOOGLE_DRIVE_ID="1uy7PNVlTQ-H56unXGOS6siRWtNcdS1J7"
           - desc: Windows-2025 VS2022 llvm20 oiio3.1
-            runner: windows-2025
-            nametag: windows-2025
+            runner: windows-2025-vs2022
+            nametag: windows-2025-vs2022
             generator: "Visual Studio 17 2022"
             python_ver: "3.12"
             opencolorio_ver: v2.3.2
@@ -661,6 +661,19 @@ jobs:
                             PUGIXML_VERSION=v1.14
                             OpenImageIO_BUILD_MISSING_DEPS="Freetype;TIFF;libdeflate;libjpeg-turbo"
                             LLVM_GOOGLE_DRIVE_ID="1uy7PNVlTQ-H56unXGOS6siRWtNcdS1J7"
+          - desc: Windows-2025 VS2026
+            runner: windows-2025-vs2026
+            nametag: windows-2025-vs2026
+            generator: "Visual Studio 18 2026"
+            python_ver: "3.12"
+            opencolorio_ver: v2.5.1
+            openexr_ver: v3.4.5
+            openimageio_ver: release
+            skip_tests: 1
+            setenvs: export OSL_CMAKE_FLAGS="-DUSE_LLVM_BTCODE=ON"
+                            PUGIXML_VERSION=v1.14
+                            OpenImageIO_BUILD_MISSING_DEPS="Freetype;TIFF;libdeflate;libjpeg-turbo"
+                            LLVM_GOOGLE_DRIVE_ID="1uy7PNVlTQ-H56unXGOS6siRWtNcdS1J7"
 
 
   optix-gpu: