Add powershell example to connection set up

[soujay]

• This PR is a fix for Connection Setup Should Have Powershell Example for Windows #2219 and it adds an example for PowerShell to the drop-down list

[Copilot]

Pull Request Overview

This PR adds PowerShell support to the configuration code generation for connection setup in the throughput report. It addresses issue #2219 by providing users with a PowerShell-specific option for setting environment variables.

• Adds a new powershell computed property to generate PowerShell environment variable syntax
• Updates the language selector switch statement to handle the PowerShell case
• Adds "PowerShell environment variables" as a new option in the dropdown menu

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[johnsimons]

LGTM

[danielmarbach]

LGTM