feat(tier4_system_msgs): change operation mode messages

[isamu-takagi]

Signed-off-by: Takagi, Isamu isamu.takagi@tier4.jp

Related Links

autowarefoundation/autoware.universe#1535

Description

Change the messages for this PR.

Remarks

None

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[isamu-takagi]

@TakaHoribe Please approve if this is okay.

[tkhmy]

@isamu-takagi, Do it mean that checking the IsAutonomousAvailable will not be used anymore?
Currently, some of the tools is using it to check whether the vehicle can engage.

[isamu-takagi]

@tkhmy
Yes, IsAutonomousAvailable will be replaced with ModeChangeAvailable. Actually, the application uses is_***_mode_available in OperationModeState. This message is created by the operation mode API using ModeChangeAvailable.

[tkhmy]

LGTM