Expose ci_inbound_job_token_scope_enabled on projects model

## What does this MR do and why?

Exposing ci_inbound_job_token_scope_enabled value in GET /projects endpoint. Issue.

Screenshots or screen recordings

GET /projects endpoint

GET /projects/:id endpoint

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

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