Install azsdk mcp server in copilot setup steps

[Ben Broderick Phillips (benbp)]

Install azsdk mcp server in copilot setup steps.

This pairs with the coding agent config in the repo settings:

{
  "mcpServers": {
    "azure-sdk-mcp": {
      "type": "local",
      "command": "/home/runner/bin/azsdk",
      "tools": [
        "AnalyzePipeline",
        "GetFailedTestCaseData",
        "CheckPackageReleaseReadiness"
      ],
      "args": [
        "start"
      ]
    }
  }
}

[Copilot]

Pull Request Overview

This PR adds installation of the Azure SDK MCP (Model Context Protocol) server to the GitHub Actions workflow for Copilot setup steps. This ensures the MCP server is available for use in automated environments.

• Adds a new step to install the azsdk MCP server using a PowerShell script
• Installs the server to the $HOME/bin directory