[ktx] Feature tools doesn't support UWP

[LilyWangLL]

Fixes #33687.
The latest build error of ktx[core,tools]:x64-uwp as below:

[111/135] C:\PROGRA~1\MICROS~3\2022\ENTERP~1\VC\Tools\MSVC\1438~1.331\bin\Hostx64\x64\cl.exe   /TP -DBASISU_NO_ITERATOR_DEBUG_LEVEL -DDEBUG -DFMT_SHARED -DKTX_FEATURE_KTX1 -DKTX_FEATURE_KTX2 -DKTX_FEATURE_WRITE -D_DEBUG -IF:\0218\buildtrees\ktx\src\v4.3.1-3a53d3f003\tools\imageio\. -IF:\0218\buildtrees\ktx\src\v4.3.1-3a53d3f003\utils -external:IF:\0218\buildtrees\ktx\src\v4.3.1-3a53d3f003\other_include -external:IF:\0218\buildtrees\ktx\src\v4.3.1-3a53d3f003\lib\astc-encoder\Source -external:IF:\0218\buildtrees\ktx\src\v4.3.1-3a53d3f003\lib\basisu -external:IF:\0218\buildtrees\ktx\src\v4.3.1-3a53d3f003\lib\dfdutils -external:IF:\0218\installed\x64-uwp\include -external:W0 /DWIN32 /D_WINDOWS /D_UNICODE /DUNICODE /DWINAPI_FAMILY=WINAPI_FAMILY_APP /D__WRL_NO_DEFAULT_LIB__ /nologo /Z7 /MP /GS /Gd /Gm- /W3 /WX- /Zc:wchar_t /Zc:inline /Zc:forScope /fp:precise /Oy- /EHsc  /utf-8  /D_DEBUG /MDd /Od /RTC1  -std:c++17 -MDd /W4 /utf-8 /showIncludes /Fotools\imageio\CMakeFiles\imageio.dir\imageinput.cc.obj /Fdtools\imageio\CMakeFiles\imageio.dir\imageio.pdb /FS -c F:\0218\buildtrees\ktx\src\v4.3.1-3a53d3f003\tools\imageio\imageinput.cc
FAILED: tools/imageio/CMakeFiles/imageio.dir/imageinput.cc.obj 
C:\PROGRA~1\MICROS~3\2022\ENTERP~1\VC\Tools\MSVC\1438~1.331\bin\Hostx64\x64\cl.exe   /TP -DBASISU_NO_ITERATOR_DEBUG_LEVEL -DDEBUG -DFMT_SHARED -DKTX_FEATURE_KTX1 -DKTX_FEATURE_KTX2 -DKTX_FEATURE_WRITE -D_DEBUG -IF:\0218\buildtrees\ktx\src\v4.3.1-3a53d3f003\tools\imageio\. -IF:\0218\buildtrees\ktx\src\v4.3.1-3a53d3f003\utils -external:IF:\0218\buildtrees\ktx\src\v4.3.1-3a53d3f003\other_include -external:IF:\0218\buildtrees\ktx\src\v4.3.1-3a53d3f003\lib\astc-encoder\Source -external:IF:\0218\buildtrees\ktx\src\v4.3.1-3a53d3f003\lib\basisu -external:IF:\0218\buildtrees\ktx\src\v4.3.1-3a53d3f003\lib\dfdutils -external:IF:\0218\installed\x64-uwp\include -external:W0 /DWIN32 /D_WINDOWS /D_UNICODE /DUNICODE /DWINAPI_FAMILY=WINAPI_FAMILY_APP /D__WRL_NO_DEFAULT_LIB__ /nologo /Z7 /MP /GS /Gd /Gm- /W3 /WX- /Zc:wchar_t /Zc:inline /Zc:forScope /fp:precise /Oy- /EHsc  /utf-8  /D_DEBUG /MDd /Od /RTC1  -std:c++17 -MDd /W4 /utf-8 /showIncludes /Fotools\imageio\CMakeFiles\imageio.dir\imageinput.cc.obj /Fdtools\imageio\CMakeFiles\imageio.dir\imageio.pdb /FS -c F:\0218\buildtrees\ktx\src\v4.3.1-3a53d3f003\tools\imageio\imageinput.cc
cl : Command line warning D9025 : overriding '/W3' with '/W4'
F:\0218\buildtrees\ktx\src\v4.3.1-3a53d3f003\utils\platform_utils.h(51): error C3861: 'CommandLineToArgvW': identifier not found
F:\0218\buildtrees\ktx\src\v4.3.1-3a53d3f003\utils\platform_utils.h(69): error C2664: 'errno_t _wfopen_s(FILE **,const wchar_t *,const wchar_t *)': cannot convert argument 2 from 'const _Elem *' to 'const wchar_t *'

Function CommandLineToArgvW is from windows header file shellapi.h, but this file doesn't support UWP.
The related upstream comment: KhronosGroup/KTX-Software#800 (comment)

• Changes comply with the maintainer guide.
• SHA512s are updated for each updated download.
• The "supports" clause reflects platforms that may be fixed by this new version.
• Any fixed CI baseline entries are removed from that file.
• Any patches that are no longer applied are deleted from the port's directory.
• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Only one version is added to each modified port's versions file.

[BillyONeal]

Thanks!