System information (version)

• OpenCV => 4.4
• Operating System / Platform => Linux
• Compiler => GCC

Detailed description

imwrite supports writing multi-page tiffs by checking whether InputArray is a MatVector

However, on python it can never be done as the binding generator does not try creating vector_Mat for InputArray - just Mat and UMat.

Steps to reproduce

import cv2

img = cv2.imread("doc/opencv-logo.png")
cv2.imwrite("multi.tiff", [img, img, img])

Issue submission checklist

• I report the issue, it's not a question
• I checked the problem with documentation, FAQ, open issues,
  answers.opencv.org, Stack Overflow, etc and have not found solution
• I updated to latest OpenCV version and the issue is still there
• There is reproducer code and related data files: videos, images, onnx, etc