(build) Add env.POWERSHELLGALLERY_API_KEY parameter

[Windos]

Description Of Changes

This PR adds the environment variable $env:POWERSHELLGALLERY_API_KEY to the TeamCity build config.

Motivation and Context

Allows for control of the user which pushes this specific project to the PowerShell Gallery.

Testing

N/A

Operating Systems Testing

N/A

Change Types Made

• Bug fix (non-breaking change).
• Feature / Enhancement (non-breaking change).
• Breaking change (fix or feature that could cause existing functionality to change).
• Documentation changes.
• PowerShell code changes.
• Build process updates.

Change Checklist

• Requires a change to the documentation.
• Documentation has been updated.
• Tests to cover my changes, have been added.
• All new and existing tests passed?
• PowerShell code changes: PowerShell v2 compatibility checked?

Related Issue

N/A

[corbob]

LGTM

[corbob]

Thanks for getting this added @Windos 👍