[windows-11-arm] Enable developer mode (to support creating symlinks as non-admin)

[dpaoliello]

Type of issue

• Error when running a workflow.
• Request for additional tools or software for an existing image.
• Request for a new image, Linux or Windows.
• Other

Describe the issue
Windows 11 requires developer mode to be enabled to support creating symlinks without elevation to admin.

The x64 image already has this enabled: https://github.com/actions/runner-images/blob/5676b8b82520e84040b0e57569be0c0db7d92c4c/images/windows/scripts/build/Configure-DeveloperMode.ps1

To Reproduce
Create a symbolic link. For example, in PowerShell:

Set-Content -Path test.txt -Value "Hello, World!"
New-Item -Type SymbolicLink -Path linked.txt -Value test.txt

Expected behavior
Symbolic link is created.

Desktop (please complete the following information):
Windows 11 Arm64