Add support in packaging.psm1 to produce a .msix AppX package. Update the docker image to use the new msix package type. Update the associated yml files so AzDevOps performs the build.
## PR Context
Enable publishing PSCore6 to Microsoft Store
This PR optimizes the download tasks to reduce build times. After the change we see a order of magnitude reduction in download times for Windows package signing and also the compliance tasks.
In addition to that the PR also makes changes to organize the build artifacts in folders.
Refactor Unified Release Build
- Make injecting the nuget.config a template
- Make setting the version variable a template
- Add parameters to templates where needed
- Run defender scan before uploading linux packages (and rename step to plain english)
Add compliance to Coordinated build
- Also switch to mac internal pool for release build
- Also turn some duplicate tasks into templates
- Also fix issue with vscode configuration which causes yaml files not to be recogized as yaml
