Adds QNX support

[pablorcum]

Fixes #4751.

[cla-assistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[confluent-cla-assistant]

🎉 All Contributor License Agreements have been signed. Ready to merge.
✅ pablorcum
_{Please push an empty commit if you would like to re-run the checks to verify CLA status for all contributors.}