US: Build an APT index

[sdake]

As a platform engineer, I want to use immutable dependencies for our product engineering so that engineering has consistent dependencies.

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Acceptance Criteria:

• [ ] Mirror upstream tool consumption, pragmatically.
• [ ] Package is built using one of the myriad of Debian system building tools.
• [ ] APT index stored in OCI Artifact Storage.
• [ ] Every update is stored in every region. (Currently: phx and ashburn).
• [ ] APT definition done via configuration.
• [ ] GitHub actions are used to build packages from the configuration.
• [ ] Prefereance towards Terraform where possible.
• [ ] DOD version 0 met.

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References:

• Computelify's prior APT index generator
• Computelify's prior APT index
• Oracle Cloud Artifact Storage System.
• Debian Development Manuals
• Older version of build gulde