[vcpkg baseline] Fix openimageio and pangolin build failures on Linux

[JackBoosY]

For openimageio:

/mnt/vcpkg-ci/buildtrees/openimageio/src/9c73ea82cc-f088f982ce.clean/src/heif.imageio/heifinput.cpp:8:10: fatal error: libheif/heif_cxx.h: No such file or directory
 #include <libheif/heif_cxx.h>
          ^~~~~~~~~~~~~~~~~~~~

This need to add libheif to the dependency list and install this extra headers.

For pangolin:

: && /usr/bin/c++  -std=c++0x -Wall -Wextra -fPIC -g  -rdynamic examples/SharedMemoryVideoWriter/CMakeFiles/SharedMemoryVideoWriter.dir/main.cpp.o  -o examples/SharedMemoryVideoWriter/SharedMemoryVideoWriter  src/libpangolin.a  -lrt  -lpthread  -lGL  -lGLU  /mnt/vcpkg-ci/installed/x64-linux/debug/lib/libGLEWd.a  -lSM  -lICE  -lX11  -lXext  /mnt/vcpkg-ci/installed/x64-linux/lib/libpython3.8.a  -ldl  /mnt/vcpkg-ci/installed/x64-linux/debug/lib/libavformat.a  /mnt/vcpkg-ci/installed/x64-linux/debug/lib/libavdevice.a  /mnt/vcpkg-ci/installed/x64-linux/debug/lib/libavcodec.a  /mnt/vcpkg-ci/installed/x64-linux/debug/lib/libavutil.a  /mnt/vcpkg-ci/installed/x64-linux/debug/lib/libswscale.a  /mnt/vcpkg-ci/installed/x64-linux/debug/lib/libswresample.a  /mnt/vcpkg-ci/installed/x64-linux/debug/lib/libpng16d.a  /mnt/vcpkg-ci/installed/x64-linux/debug/lib/libz.a  /mnt/vcpkg-ci/installed/x64-linux/debug/lib/libjpeg.a  /mnt/vcpkg-ci/installed/x64-linux/debug/lib/libtiffd.a  /mnt/vcpkg-ci/installed/x64-linux/debug/lib/liblzmad.a  /mnt/vcpkg-ci/installed/x64-linux/debug/lib/libz.a  /mnt/vcpkg-ci/installed/x64-linux/debug/lib/libjpeg.a  /mnt/vcpkg-ci/installed/x64-linux/debug/lib/libtiffd.a  /mnt/vcpkg-ci/installed/x64-linux/debug/lib/liblzmad.a  -lm && :
/mnt/vcpkg-ci/installed/x64-linux/lib/libpython3.8.a(posixmodule.o): In function `os_openpty_impl':
/mnt/vcpkg-ci/buildtrees/python3/src/v3.8.3-43b03f2bf0.clean-x64-linux-release/./Modules/posixmodule.c:6683: undefined reference to `openpty'

This is caused by not adding the libutil library in the Linux system when pangolin uses python.

Related: #12672 #11836 #10132 etc.

[JackBoosY]

@strega-nil If you have no worries, please consider merging this PR first.

[ras0219]

In a separate PR, we should also seek to control whether pangolin is using python via a feature -- some sort of pangolin[python] that will otherwise suppress the python check via -DCMAKE_DISABLE_FIND_PACKAGE_PythonLibs=ON.

Roughly

vcpkg_check_features(
  ...
  INVERTED_FEATURES python CMAKE_DISABLE_FIND_PACKAGE_PythonLibs
)

The python feature would then also Build-Depends: on python3.