vtk build failure when VCPKG_BUILD_TYPE=release

[rossctaylor]

Host Environment

• OS: Windows 10
• Compiler: VS2019

To Reproduce
Steps to reproduce the behavior:
In PowerShell:

cp .\triplets\x64-windows.cmake .\triplets\x64-windows-release.cmake
Add-Content .\triplets\x64-windows-release.cmake "set(VCPKG_BUILD_TYPE release)"
./vcpkg install vtk

Failure logs

CMake Error at ports/vtk/portfile.cmake:201 (file):
  file failed to open for reading (No such file or directory):

    C:/Users/Ross Taylor/Q/vcpkg/packages/vtk_x64-windows-release/share/vtk/VTK-targets-debug.cmake

Additional context
If only release is built there is no VTK-targets-debug.cmake file generated so the code that tries to modify it fails. A simple fix is to verify the file is there (in portfile.cmake line 199):

    # we also have to bend the lines referencing the tools in VTKTargets-debug.cmake
    # to make them point to the release version of the tools
    set(filename ${CURRENT_PACKAGES_DIR}/share/vtk/VTK-targets-debug.cmake)
    if(EXISTS ${filename})
        file(READ "${CURRENT_PACKAGES_DIR}/share/vtk/VTK-targets-debug.cmake" VTK_TARGETS_CONTENT_DEBUG)
        string(REPLACE "debug/bin/${TOOL_NAME}" "tools/vtk/${TOOL_NAME}" VTK_TARGETS_CONTENT_DEBUG "${VTK_TARGETS_CONTENT_DEBUG}")
        string(REPLACE "tools/vtk/${TOOL_NAME}d" "tools/vtk/${TOOL_NAME}" VTK_TARGETS_CONTENT_DEBUG "${VTK_TARGETS_CONTENT_DEBUG}")
        file(WRITE "${CURRENT_PACKAGES_DIR}/share/vtk/VTK-targets-debug.cmake" "${VTK_TARGETS_CONTENT_DEBUG}")
    endif()