docs: add VAD CARLA tutorial entry

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Description

• Add autoware_tensorrt_vad entry to the CARLA Simulation tutorial.

How was this PR tested?

• Not tested (documentation-only change).

Notes for reviewers

• None.

Effects on system behavior

• None.

[github-actions]

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[github-actions]

Documentation URL: https://autowarefoundation.github.io/autoware-documentation/pr-700/
Modified URLs:

• https://autowarefoundation.github.io/autoware-documentation/pr-700/tutorials/ad-hoc-simulation/digital-twin-simulation/carla-tutorial/

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@mitsudome-r @yukkysaito
This is an update describing how to use VAD’s end-to-end simulation with carla. Please review it.