Finish internal build workflow

[VersusFacit]

Problem

We need a workflow that calls the internal build release workflow found here.

Solution

This PR adds the file and documents the what/how/why.

Proof of the build process working:

Checklist

• I have read the contributing guide and understand what's expected of me
• I have run this code in development and it appears to resolve the stated issue
• This PR includes tests, or tests are not required/relevant for this PR
• This PR has no interface changes (e.g. macros, cli, logs, json artifacts, config files, adapter interface, etc) or this PR has already received feedback and approval from Product or DX

[github-actions]

Thank you for your pull request! We could not find a changelog entry for this change. For details on how to document a change, see the dbt-redshift contributing guide.

[VersusFacit]

This workflow is working with test :D

Documentation added.

It's fully ready to be reviewed and considered done with this PR.

[VersusFacit]

Going to change this once main has all the changes needed to support all the other workflows. Since this PR's workflow can be invoked using the branch reference, I'll merge at the time I can revert to main (unless there is an alternate path desired)

[mikealfare]

FYI, the failing integration tests are the usual flaky tests, and don't seem related to this PR.

[VersusFacit]

https://github.com/dbt-labs/dbt-redshift/actions/runs/8443805653 is the clean build for the latest sha