fix(autoware_string_stamped_overlay_rviz_plugin): clear overlay if message timestamp is old

[saka1-s]

Description

The autoware_string_stamped_overlay_rviz_plugin keeps text displayed for a certain amount of time. This makes it difficult for me to determine if a message is the latest one when I repeatedly play a rosbag. This pull request changes the plugin to clear the displayed text if the timestamp is old.

Related links

Parent Issue:

• Link

How was this PR tested?

I tested with a rosbag.

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

[github-actions]

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[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@5f02b1b). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
...rviz_plugin/src/string_stamped_overlay_display.cpp	0.00%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff           @@
##             main     #22   +/-   ##
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  Coverage        ?   0.00%           
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  Files           ?       2           
  Lines           ?     190           
  Branches        ?      16           
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  Hits            ?       0           
  Misses          ?     190           
  Partials        ?       0           

Flag	Coverage Δ
differential	0.00% <0.00%> (?)

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