feat(autoware.repos): remove autoware_auto_msgs

[xmfcx]

Description

This PR is to remove autoware_auto_msgs completely from Autoware.

Autoware still doesn't build with this repository removed because:

• https://github.com/tier4/tier4_ad_api_adaptor/blob/d8008411140d75e8b0d5fd8167b4a37b07efb79e/awapi_awiv_adapter/package.xml#L35
• https://github.com/tier4/tier4_ad_api_adaptor/blob/d8008411140d75e8b0d5fd8167b4a37b07efb79e/autoware_iv_internal_api_adaptor/package.xml#L14

Still depend on it.

Tests performed

Perform a clean build with this repository removed.

Effects on system behavior

Not applicable.

Interface changes

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[xmfcx]

Created this PR:

• feat: remove autoware_auto_msgs references tier4/tier4_ad_api_adaptor#122

And temporarily pointing to that to check if it all compiles and passes the tests.

[xmfcx]

tier4/tier4_ad_api_adaptor#122 (review)

These APIs define the output type as auto_msgs in their specifications, so it cannot be changed. Currently, all APIs other than the RTC API are deprecated, so I'm considering removing the reference to this repository.

@isamu-takagi san, could you take over this PR then?

[isamu-takagi]

Instead of removing the entire repository, remove the API related to autoware_auto_msgs. tier4/tier4_ad_api_adaptor#124

[isamu-takagi]

This PR should be merged after tier4/tier4_ad_api_adaptor#124.