Removes use of static variable in GetLanes binding.

[francocipollone]

🦟 Bug fix

Fixes #88

Summary

• Removes use of static for retrieving the lanes.
• Adds example using more than one road geometry at the same time.

Checklist

• [x] Signed all commits for DCO
• [ ] Added tests
• [x] Updated documentation (as needed)
• [ ] Updated migration guide (as needed)
• [ ] Consider updating Python bindings (if it affects the public API)

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