Pull Request Readiness Checklist

Python syntax errors discovered by #21121
Closes #21122

futurize -f libfuturize.fixes.fix_print_with_import -w \
    ./modules/ts/misc/report.py \
    ./modules/ts/misc/summary.py \
    ./modules/ts/misc/chart.py

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

• I agree to contribute to the project under Apache 2 License.
• To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
• The PR is proposed to the proper branch
• There is a reference to the original bug report and related work
• There is accuracy test, performance test, and test data in opencv_extra repository, if applicable
  Patch to opencv_extra has the same branch name.
• The feature is well documented and sample code can be built with the project CMake