refactor(autoware_rviz_plugins): use autoware_ament_auto_package

[vish0012]

Description

This PR replaces ament_auto_package() with autoware_ament_auto_package() for packages in autoware_rviz_plugins that emitted scoped header installation warnings during the clean build investigation.

Updated packages:

• autoware_perception_rviz_plugin
• autoware_planning_rviz_plugin

How was this PR tested?

Tested with:

colcon build --base-paths ~/autoware_scoped_headers/autoware/src --symlink-install --cmake-args -DCMAKE_BUILD_TYPE=Release --packages-up-to autoware_planning_rviz_plugin autoware_perception_rviz_plugin

Both target packages built successfully.

Notes for reviewers

This is part of the follow-up work after adding USE_SCOPED_HEADER_INSTALL_DIR support to autoware_cmake.

Effects on system behavior

No functional behavior change is intended. This updates the package macro to the Autoware wrapper for the scoped header migration work.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
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Additional details and impacted files

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