RgbdCameraSensor: add missing include

[scpeters]

🦟 Bug fix

Fixes clang-tidy missing include complaint

Summary

Include gz/msgs/PointCloudPackedUtils.hh for gz::msgs::InitPointCloudPacked.

Checklist

• [X] 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)
• [X] codecheck passed (See contributing)
• [X] All tests passed (See test coverage)
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[scpeters]

Thanks Steve, please consider also adding the include in https://github.com/gazebosim/gz-sensors/blob/gz-sensors8/src/DepthCameraSensor.cc, where we also use msgs::InitPointCloudPacked

thanks; I've added the missing header to DepthCameraSensor and also GpuLidarSensor in https://github.com/gazebosim/gz-sensors/pull/464/commits/80f07cb5f494888309c12900bd1adcfa748b65f1