[opencv] update to 4.9

[cenit]

Fixes #39884
Fixes #39835
Fixes #39651
Fixes #39454
Fixes #39224
Fixes #38321
Fixes #36771
Fixes #36093
Fixes #36009
Fixes #35937
Fixes #34559
Fixes #34279
Fixes #33742
Fixes #32228
Fixes #17850
Fixes #13120
Fixes #4937

Depending on #39703 (need to remove ffmpeg from ci.baseline here after that PR acceptance)

• 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.

[Neumann-A]

Please also fix python installation behavior.
I needed to add:
-D__INSTALL_PATH_PYTHON3=${CURRENT_PACKAGES_DIR}/${PYTHON3_SITE}/cv2

and for cleanup later:

  file(GLOB python_dir LIST_DIRECTORIES true RELATIVE "${CURRENT_PACKAGES_DIR}/lib/" "${CURRENT_PACKAGES_DIR}/lib/python*")
  file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/lib/${python_dir}/site-packages/cv2/typing")
  file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/debug/lib/${python_dir}/site-packages/cv2/typing")

However if the install logs show that python bindings get installed into the right directory already than consider this obsolete.

[cenit]

the residual error on openvino due to pkgconf missing is triggered by a bug in cmake.
The error is
CMake Error at FindOpenSSL.cmake:207 (pkg_check_modules): Unknown CMake command "pkg_check_modules".

This is in fact the snippet in FindOpenSSL.cmake official module:

if (UNIX)
  find_package(PkgConfig QUIET)
  pkg_check_modules(_OPENSSL QUIET openssl)
endif ()

as you can see, the module is using pkg_check_modules after a find_package "QUIET". In case the find fails, you don't have the command available and it should fail more gracefully...
I tried adding some lines to openvino port to make it sure that pkgconf is there, but without success. I am not sure this PR is responsible to make openvino work... i don't know why it's not failing on master

[dg0yt]

the module is using pkg_check_modules after a find_package "QUIET". In case the find fails, you don't have the command available and it should fail more gracefully...

AFAICT pkg_check_modules is always defined after find_package(PkgConfig). CMake always loads the whole module. The macro just won't be successful if there is no pkg-config executable.