Add support for publishing build artefacts to GitHub Packages

[JamesDawson]

Currently we create pipeline artefacts associated to a given run of the build for the following types of items:

• [ ] NuGet library packages
• [ ] Deployment packages
• [ ] SBOM reports
• [ ] Log files

We might also want to consider extending the above list to include:

• [ ] Test results
• [ ] Code coverage
• [ ] Container images
• [ ] PowerShell modules