What does this MR do?

Extend BuildDetailEnity to include a new key deployment_status which has all the information about deployments.

What are the relevant issue numbers?

gitlab-org/gitlab-ce#50460

gitlab-org/gitlab-ce#50101

To Do

• Create issue for environment json schema

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides

Closes #50460 (closed)