COMP: Skip ITK path length checks on Windows CI

Remote module repo names like ITKFixedPointInverseDisplacementField
create build paths exceeding ITK's 50-character Windows limit
(D:\a\<reponame>\ITK-build = 51+ chars). Pass
ITK_SKIP_PATH_LENGTH_CHECKS=ON unconditionally on Windows to
prevent configure failures for long-named modules.

Author: hjmjohnson

.github/workflows/build-test-cxx.yml

@@ -174,7 +174,12 @@ jobs:
           echo "Building with parameters: ${{ inputs.itk-cmake-options }} $MODULE_ARGS"
         }
 
-        cmake -DCMAKE_C_COMPILER:FILEPATH="${{ matrix.c-compiler }}" -DBUILD_SHARED_LIBS:BOOL=ON -DCMAKE_CXX_COMPILER="${{ matrix.cxx-compiler }}" -DCMAKE_BUILD_TYPE:STRING=${{ matrix.cmake-build-type }} -DBUILD_TESTING:BOOL=OFF ${{ inputs.itk-cmake-options }} $MODULE_ARGS.split(" ") -GNinja ../ITK
+        # Skip ITK path length checks on Windows — remote module repo names
+        # like ITKFixedPointInverseDisplacementField push the build path
+        # past ITK's 50-character limit (see ITK CMakeLists.txt:128).
+        $PATH_SKIP_ARG = "-DITK_SKIP_PATH_LENGTH_CHECKS:BOOL=ON"
+
+        cmake -DCMAKE_C_COMPILER:FILEPATH="${{ matrix.c-compiler }}" -DBUILD_SHARED_LIBS:BOOL=ON -DCMAKE_CXX_COMPILER="${{ matrix.cxx-compiler }}" -DCMAKE_BUILD_TYPE:STRING=${{ matrix.cmake-build-type }} -DBUILD_TESTING:BOOL=OFF $PATH_SKIP_ARG ${{ inputs.itk-cmake-options }} $MODULE_ARGS.split(" ") -GNinja ../ITK
         ninja
 
     - name: Fetch CTest driver script