Enable partial build and package for local testing

[mjhilton]

Background

The .\build-local.ps1 script currently has a few minor time-saving optimisations, but still can take 10-15 minutes to prepare a whole Calamari package. That's way too long for an effective development loop.

Changes

This PR adds a parameter to the build script which allows you to specify an array of Calamari Flavours to build, with everything else excluded. The core Calamari is always included, because this is needed for package acquisition, so it's very unlikely that you'll be able to get a functioning Deployment without it.

Results

Full local build, ready for testing in Server (with a single Flavour) takes around 2.5 minutes. Build time would increase linearly for each extra flavour included.

Usage

Execute the build-local script with a -PartialBuildFlavours parameter.

To build only AzureScripting (aka "Run an Azure Script"):

.\build-local.ps1 -PartialBuildFlavours Calmari.AzureScripting

To build AzureScripting and Terraform:

.\build-local.ps1 -PartialBuildFlavours Calmari.AzureScripting, Calamari.Terraform

[mjhilton]

I believe there's still some fundamental rework we could do to what is now a very large and sprawling build process. I'm pretty sure there's a stack of duplication and unnecessary work done in it, which could be slimmed down and sped up. But in the interest of smaller safer changes, this helps.