Freetype has been found when there are no freetype in environment (Windows)

使用列出的环境变量从仓库根目录重现 Windows wheel 构建，然后检查 opencv_contrib/modules/freetype/CMakeLists.txt 中显示的 freetype 检查以及 OpenCVUtils.cmake 中的警告。当缺少 FreeType 安装时不会产生 freetype.lib 链接失败，并且无需手动设置 BUILD_opencv_freetype=OFF，构建仍能完成，即视为完成。

Actual behaviour

I have faced the issue when I do not have pre-installed freetype in my environment, but during a build cmake finds it and try to build the project with it.
The log during the configuration:

  -- Checking for module 'freetype2'
  --   Found freetype2, version 23.0.17
  CMake Warning at C:/Users/runneradmin/AppData/Local/Temp/pip-req-build-egif0lkt/opencv/cmake/OpenCVUtils.cmake:882 (message):
    ocv_check_modules(FREETYPE): can't find library 'freetype'.  Specify
    'pkgcfg_lib_FREETYPE_freetype' manually
  Call Stack (most recent call first):
    C:/Users/runneradmin/AppData/Local/Temp/pip-req-build-egif0lkt/opencv_contrib/modules/freetype/CMakeLists.txt:6 (ocv_check_modules)

And the log during the build:

  LINK : fatal error LNK1181: cannot open input file 'freetype.lib' [C:\Users\runneradmin\AppData\Local\Temp\pip-req-build-egif0lkt\_skbuild\win32-3.6\cmake-build\modules\python3\opencv_python3.vcxproj]

Steps to reproduce

• example code:

Run building a wheel command in the root directory of opencv-python repository with the following environment variables:
SDIST=0
ENABLE_HEADLESS=0
ENABLE_CONTRIB=1

python -m pip wheel --wheel-dir=%cd%\wheelhouse . --verbose

• operating system: Windows x86 / x64
• architecture (e.g. x86)
• opencv-python version: 4.5.2
• branch: master

Issue submission checklist

• This is not a generic OpenCV usage question (looking for help for coding, other usage questions, homework etc.)
• I have read the README of this repository and understand that this repository provides only an automated build toolchain for OpenCV Python packages (there is no actual OpenCV code here)
• The issue is related to the build scripts in this repository, to the pre-built binaries or is a feature request (such as "please enable this additional dependency")
• I'm using the latest version of opencv-python

How to temporary fix it

I have added the flag -DBUILD_opencv_freetype=OFF to suppress freetype and to build without it.