(build) Install dotnet-6.0-runtime for QA Build

[Windos]

Description Of Changes

This PR installs the dotnet-6.0-runtime package required for the QA Build / Dependency-Check to run.

Motivation and Context

Older versions of the build agent had this baked in, but it is no longer in newer versions. Instead of re-introducing it to the build agent image, we'll install it when needed in order to run the Dependency-Check task.

Testing

To test that the build agents can install dotnet-6.0-runtime and that installing it allows the Dependency-Check task to run, the user data script was temporarily amended to add this install at that point in the build process.

This worked and the Dependency-Check task ran as expected.

Operating Systems Testing

• Windows Server 2019

Change Types Made

Build

• 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.

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

[gep13]

LGTM!

[gep13]

@Windos thanks for getting this added!