Return same as billing for shipping cart adresses

[indykoning]

Description (*)

This PR adds the same_as_billing to the cart address definition, it is already available in the data and headless frontends will not be able to properly display prevously entered data without it.
Thus it doesn't make sense not sending this as well.

Related Pull Requests

• https://github.com/rapidez/core/pull/503/files#diff-7c3b2137e005c37a4c76f8070ffa1fe4d1e5052e8afdc35eac501d170af3f045R150

Questions or comments

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update
• All automated tests passed successfully (all builds are green)

Resolved issues:

1. resolves [Issue] Return same as billing for shipping cart adresses #38984: Return same as billing for shipping cart adresses

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