Qt6 compile fix

[mosfet80]

Description

the patch allows compilation with both qt5 and qt6

Checklist

• Required by CI: Code is auto formatted using clang-format
• Extend the tutorials / documentation reference
• Document API changes relevant to the user in the MIGRATION.md notes
• Create tests, which fail without this PR reference
• Include a screenshot if changing a GUI
• While waiting for someone to review your request, please help review another open pull request to support the maintainers

[rhaschke]

Is this a backport of moveit/moveit#3582? If so, why didn't you declare it like this?
If not, why not? The PR was already reviewed and we should not do work twice.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.00%. Comparing base (848c062) to head (ccbab53).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #3493       +/-   ##
==========================================
- Coverage   46.24%   0.00%   -46.23%     
==========================================
  Files         726      51      -675     
  Lines       59483    5938    -53545     
  Branches     7624    1057     -6567     
==========================================
- Hits        27504       0    -27504     
+ Misses      31813    5938    -25875     
+ Partials      166       0      -166     

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[github-actions]

This PR is stale because it has been open for 45 days with no activity. Please tag a maintainer for help on completing this PR, or close it if you think it has become obsolete.

[mosfet80]

Is this a backport of moveit/moveit#3582? If so, why didn't you declare it like this? If not, why not? The PR was already reviewed and we should not do work twice.

In fact, if you compile with only Qt6, the build fails.
The patch fixes the problem of compiling Moveit with Qt 5 and 6 simultaneously. If I analyze the cmake file moveit_ros/visualization/motion_planning_rviz_plugin/CMakeLists.txt,
the Qt5 library is included even when using Qt6.
And, qt5_wrap_cpp is also used when using Qt6.