Include optional in pose_tracking

[JafarAbdi]

Description

CI is failing for not being able to find boost::optional see

/home/runner/work/moveit2/moveit2/.work/target_ws/src/moveit2/moveit_ros/moveit_servo/include/moveit_servo/pose_tracking.h:193:10: error: ‘optional’ in namespace ‘boost’ does not name a template type; did you mean ‘conditional’?

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

[AndyZe]

Thanks! it would be cool if you alphabetize the includes

[codecov]

Codecov Report

Merging #406 (ed95058) into main (855db9e) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #406      +/-   ##
==========================================
+ Coverage   53.04%   53.04%   +0.01%     
==========================================
  Files         212      212              
  Lines       22612    22612              
==========================================
+ Hits        11992    11993       +1     
+ Misses      10620    10619       -1     

Impacted Files	Coverage Δ
...bot_model/include/moveit/robot_model/robot_model.h	92.86% <ø> (ø)
...bot_state/include/moveit/robot_state/robot_state.h	88.89% <ø> (ø)
...nning_scene_monitor/src/planning_scene_monitor.cpp	56.24% <0.00%> (+0.13%)	⬆️

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