Added ability to wait for pipeline to complete and to get output vars

[CasperJ]

Added ability to wait for pipeline to complete and to get output variables

Hey, I just made a Pull Request!

Added feature for scaffolder action to wait for the Azure DevOps Pipeline to complete. Added feature to get the output of the variables once pipeline has completed

:heavy_check_mark: Checklist

• [X] A changeset describing the change and affected packages. (more info)
• [X] Added or updated documentation
• [X] Tests for new functionality and regression tests for bug fixes
• [ ] Screenshots attached (for UI changes)
• [X] All your commits have a Signed-off-by line in the message. (more info)

[backstage-goalie[bot]]

Changed Packages

Package Name	Package Path	Changeset Bump	Current Version
@backstage-community/plugin-scaffolder-backend-module-azure-devops	workspaces/azure-devops/plugins/scaffolder-backend-module-azure-devops	minor	v0.8.1

[awanlin]

Hi @CasperJ, thanks for the contribution, I'll review this later this week when I have more time to go over it.

@Phiph, as the initial author of the scaffolder actions could you also give this a look over, please?

[github-actions[bot]]

This PR has been automatically marked as stale because it has not had recent activity from the author. It will be closed if no further activity occurs. If the PR was closed and you want it re-opened, let us know and we'll re-open the PR so that you can continue the contribution!

[awanlin]

Will merge once the built completes and is passing 👍