bullet-featherstone: Parse voxel resolution SDF param when decomposing meshes

[iche033]

🎉 New feature

Summary

Makes use of the voxel resolution SDF param added in https://github.com/gazebosim/sdformat/pull/1429.

see screenshot of a mesh with different voxel resolutions in https://github.com/gazebosim/gz-sim/pull/2445

Checklist

• [x] Signed all commits for DCO
• [ ] Added tests
• [ ] Added example and/or tutorial
• [ ] 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[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 79.26%. Comparing base (92e02c3) to head (02e6738). Report is 20 commits behind head on gz-physics7.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## gz-physics7 #655 +/- ## =============================================== + Coverage 78.32% 79.26% +0.93% =============================================== Files 140 141 +1 Lines 8069 8274 +205 =============================================== + Hits 6320 6558 +238 + Misses 1749 1716 -33 ```

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