Disable pybind11 on Windows by default

[Crola1702]

🦟 Bug fix

(Copied from gazebosim/gz-math#529)

Fixes part of #2003 (discussion on gazebosim/gz-launch#220)

Summary

This PR disabled pybind11 on windows by default until we fix the Windows build regressions that are related to #2003

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[codecov]

Codecov Report

Merging #2005 (782642a) into ign-gazebo6 (c0a7428) will increase coverage by 0.01%.
The diff coverage is n/a.

❗ Current head 782642a differs from pull request most recent head 27ef368. Consider uploading reports for the commit 27ef368 to get more accurate results

@@               Coverage Diff               @@
##           ign-gazebo6    #2005      +/-   ##
===============================================
+ Coverage        65.35%   65.37%   +0.01%     
===============================================
  Files              327      327              
  Lines            26996    26996              
===============================================
+ Hits             17644    17648       +4     
+ Misses            9352     9348       -4     

see 3 files with indirect coverage changes

[azeey]

We're still doing find_package(pybind11) on line 206. That should be conditioned on SKIP_PYBIND11.

[Crola1702]

I see -- SKIP_PYBIND11 set - disabling python bindings in https://build.osrfoundation.org/job/ign_gazebo-pr-win/5728/. So in theory, it's working fine.

[azeey]

Looks like mac-four is having a permissions issue:

==> Reinstalling 4 dependents with broken linkage from source:
osrf/simulation/ignition-fuel-tools7, osrf/simulation/ignition-gui6, osrf/simulation/ignition-sensors6, osrf/simulation/ignition-transport11
Error: Could not rename ignition-fuel-tools7 keg! Check/fix its permissions:
  sudo chown -R $(whoami) /usr/local/Cellar/ignition-fuel-tools7/7.2.2
Build step 'Execute shell' marked build as failure

[j-rivero]

Mostly fine, some minor comments.