fix(autoware_planning_validator): revert node name change

[kyoichi-sugahara]

Description

change node name in the PR and it causes diag error.
As a result, autoware engage from RVIZ gui was not working.

The error was following by clicking the gui bottom

[service_log_checker_node-4] [ERROR 1717762673.010612554] [system.service_log_checker]: /api/operation_mode/change_to_autonomous: status code 1 'The mode change is blocked by the system.' (/default_ad_api/node/operation_mode) (set_error():84)

Tests performed

confirmed engage works with psim

Effects on system behavior

Not applicable.

Interface changes

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