feat(pointlcoud_preprocessor): use StringStamped in autoware_internal_debug_msgs

[takayuki5168]

Description

Run the following command, and manually add autoware_internal_debug_msgs in the package.xml

find ./ -type f -exec sed -i -e 's/tier4_debug_msgs::msg::StringStamped/autoware_internal_debug_msgs::msg::StringStamped/g' {} \;
find ./ -type f -exec sed -i -e 's/tier4_debug_msgs\/msg\/string_stamped/autoware_internal_debug_msgs\/msg\/string_stamped/g' {} \;

Related links

autowarefoundation/autoware#5580

How was this PR tested?

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

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