chore(e2e_launch): add launch_sensing_driver arg

[TakaHoribe]

Description

To launch a sensing driver (e.g. Nebula) via argument control, I added launch_sensing_driver arg in the launch file.

Tests performed

Added a log message in the autoware.launch.xml, and confirmed the argument control works fine.

I also tested with AWSIM to ensure the sensor driver launched correctly. Since the test was conducted locally, I will omit the details here.

Effects on system behavior

None since the default parameter is not changed.

Interface changes

launch_sensing_driver variable can be controlled via CLI like below:

ros2 launch autoware_launch e2e_simulator.launch.xml launch_sensing_driver:=true 

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[knzo25]

@TakaHoribe
nit:
In the launcher I see two conventions. I think we are migrating to launch_.... right?

<arg name="launch_sensing" value="$(var sensing)"/>
...
<arg name="launch_sensing_driver" value="$(var launch_sensing_driver)"/>

[knzo25]

LGTM!
(I left a nit, but I am not sure if it should be addressed or not)

[xmfcx]

I think we should rename these variables to have launch_ prefix later on to express the intent more directly. I think @TakaHoribe 's way is alright.

[TakaHoribe]

@knzo25 @xmfcx Thank you for your reviews! As you guys say, sensing, perception... should be renamed by launch_sensing.