handle continuous joints in getLowerAndUpperLimits (backport #3153)

[mergify]

Description

The RevoluteJointModel returns -pi/pi as position joint limits for continuous joints, which are not position bounded.
This PR fixes getLowerAndUpperLimits to check the position_bounded_ flag and return joint limits accordingly.

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

---

This is an automatic backport of pull request #3153 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of ecd5d30 has failed:

On branch mergify/bp/humble/pr-3153
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You are currently cherry-picking commit ecd5d3007.
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Unmerged paths:
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	deleted by us:   moveit_core/robot_model/include/moveit/robot_model/joint_model_group.hpp
	both modified:   moveit_core/robot_model/src/joint_model_group.cpp

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[sea-bass]

Ah, this functionality was not introduced until #2861 -- this backport is not compatible with Humble.

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 0.00%. Comparing base (d13d835) to head (f50a319).

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Additional details and impacted files

@@            Coverage Diff             @@
##           humble   #3154       +/-   ##
==========================================
- Coverage   42.26%       0   -42.25%     
==========================================
  Files         668       0      -668     
  Lines       57740       0    -57740     
  Branches     7322       0     -7322     
==========================================
- Hits        24398       0    -24398     
+ Misses      33157       0    -33157     
+ Partials      185       0      -185     

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