(moveit_py) Extend Trajectory Execution Manager

[JensVanhooydonck]

Added part of the functions from #2442

Description

Added execute, execute_and_wait, wait_for_execution and get_last_execution_status.
I also added py::call_guardpy::gil_scoped_release() for the (possible) long running calls to free up the ptyhon thread.

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (bddab3f) 50.87% compared to head (5632668) 50.46%.
Report is 1 commits behind head on main.

❗ Current head 5632668 differs from pull request most recent head 25ba427. Consider uploading reports for the commit 25ba427 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2569      +/-   ##
==========================================
- Coverage   50.87%   50.46%   -0.41%     
==========================================
  Files         388      387       -1     
  Lines       32253    32078     -175     
==========================================
- Hits        16407    16186     -221     
- Misses      15846    15892      +46     

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[MatthijsBurgh]

Only 3 small improvements left from my side

[MatthijsBurgh]

@JensVanhooydonck You have some whitespace issues in trajectory_execution_manager.cpp. See the formatting job.