attempt to use shared scripts for build and remove docker use

[mjkkirschner]

Purpose

• Remove docker use
• For most steps use shared scripts
• publish still relies on a custom script as I'd like to leverage the packaging happening during the build, making a nuspec unnecessary.

I somehow need to test this without merging this PR - I guess I will send another temp PR to the mirror?

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.

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[aparajit-pratap]

Maybe an improvement for later but I feel we can also move this script to the common CICDResources repo as it seems to be common to projects using the repo.

[mjkkirschner]

yeah, I am not sure how we'd do that - this is the script that retrieves the common cicd resources... perhaps we could add something to the CI lib directly?

[mjkkirschner]

successful build, scan and test on the internal PR here:
https://git.autodesk.com/Dynamo/PackageManagerClient/pull/6
I will merge this and watch the mirror for successful push to nuget - will send another PR if that fails.