Const ptr to jmg arg for cost function

[tylerjw]

Signed-off-by: Tyler Weaver tyler@picknik.ai

Description

This shouldn't break anything and is more consistent with the use of jmg. @wyattrees did you have some reason to make this a non-const ptr?

Also, @wyattrees why does this cost function take a single pose and not a vector of poses?

[codecov]

Codecov Report

Merging #1537 (77e3485) into main (888fc53) will increase coverage by 0.02%.
The diff coverage is n/a.

❗ Current head 77e3485 differs from pull request most recent head ec630c7. Consider uploading reports for the commit ec630c7 to get more accurate results

@@            Coverage Diff             @@
##             main    #1537      +/-   ##
==========================================
+ Coverage   50.98%   50.99%   +0.02%     
==========================================
  Files         380      380              
  Lines       31768    31768              
==========================================
+ Hits        16193    16197       +4     
+ Misses      15575    15571       -4     

Impacted Files	Coverage Δ
...e/include/moveit/kinematics_base/kinematics_base.h	76.32% <ø> (ø)
moveit_core/robot_state/src/robot_state.cpp	47.44% <0.00%> (+0.08%)	⬆️
...dl_kinematics_plugin/src/kdl_kinematics_plugin.cpp	76.43% <0.00%> (+1.08%)	⬆️

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