refactor(vehicle_cmd_gate): rename adapi pause interface

[isamu-takagi]

Description

Since the pause interface has specialized processing for AD API and its name is confusing, I changed its name and added a comment.

Tests performed

Check autonomous mode driving in simple planning simulator.

Effects on system behavior

Not applicable.

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[codecov]

Codecov Report

Patch coverage: 14.28% and project coverage change: -0.42 ⚠️

Comparison is base (68f6f2f) 14.44% compared to head (e53c506) 14.03%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3794      +/-   ##
==========================================
- Coverage   14.44%   14.03%   -0.42%     
==========================================
  Files        1456     1440      -16     
  Lines      102483    99791    -2692     
  Branches    29691    26333    -3358     
==========================================
- Hits        14806    14006     -800     
+ Misses      71523    70455    -1068     
+ Partials    16154    15330     -824     

Flag	Coverage Δ		*Carryforward flag
differential	19.40% <0.00%> (?)
total	14.04% <100.00%> (-0.41%)	⬇️	Carriedforward from fd71b6d

*This pull request uses carry forward flags. Click here to find out more.

Impacted Files	Coverage Δ
...rol/vehicle_cmd_gate/src/adapi_pause_interface.cpp	0.00% <0.00%> (ø)
control/vehicle_cmd_gate/src/vehicle_cmd_gate.cpp	0.29% <0.00%> (ø)
control/vehicle_cmd_gate/src/vehicle_cmd_gate.hpp	0.00% <ø> (ø)
...anner/include/behavior_path_planner/parameters.hpp	50.00% <ø> (ø)
...lanner/scene_module/avoidance/avoidance_module.hpp	0.00% <ø> (ø)
..._planner/utils/avoidance/avoidance_module_data.hpp	0.00% <ø> (ø)
...or_path_planner/src/behavior_path_planner_node.cpp	19.09% <ø> (+0.44%)	⬆️
...er/src/scene_module/avoidance/avoidance_module.cpp	4.18% <ø> (+0.34%)	⬆️
planning/rtc_interface/src/rtc_interface.cpp	14.28% <100.00%> (-18.05%)	⬇️

... and 172 files with indirect coverage changes

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[isamu-takagi]

@TakaHoribe @tkimura4 I have resolved the conflict.

[TakaHoribe]

LGTM