pybind11_vendor is removed using rosdistro key

[ahcorde]

Description

We are planning to remove pybind11_vendor. It should be fine to install the rosdep key and on Windows pixi is doing the job.

Related ros2/ros2#1740

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.
✅ Project coverage is 0.00%. Comparing base (3e526af) to head (5add236).

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #3568   +/-   ##
=====================================
  Coverage   0.00%   0.00%           
=====================================
  Files        181     181           
  Lines      22649   22649           
  Branches    3108    3108           
=====================================
  Misses     22649   22649           

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