CI Update - SourceLink config for Windows Forms

[gewarren]

Build.Reason:Manual by Genevieve Warren
Build.Url:https://apidrop.visualstudio.com/Content%20CI/_build/results?buildId=477391&view=results
source_repo.branch:wf-config
source_repo.url:https://apidrop.visualstudio.com/_git/binaries

Summary

Added implementation package as a dependent package, since those assemblies have the debug info and the ref package doesn't.

[dotnet-policy-service]

@gewarren - This PR edits one or more files whose 'source of truth' for documentation is not in this repo. Please make documentation updates in the /// comments in the dotnet/runtime repo (or dotnet/extensions repo) instead.

[learn-build-service-prod]

Learn Build status updates of commit 92f599f:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/Microsoft.Extensions.Caching.Hybrid/HybridCache.xml	✅Succeeded	View
xml/Microsoft.Extensions.DependencyInjection.Extensions/ServiceCollectionDescriptorExtensions.xml	✅Succeeded	View
xml/Microsoft.Extensions.Diagnostics.Metrics/MetricsBuilderExtensions.xml	✅Succeeded	View
xml/SourceLinkInformation/windowsdesktop-7.0/Microsoft.VisualBasic.Forms.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-7.0/Microsoft.Win32.Registry.AccessControl.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-7.0/Microsoft.Win32.SystemEvents.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-7.0/System.CodeDom.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-7.0/System.Configuration.ConfigurationManager.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-7.0/System.Diagnostics.EventLog.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-7.0/System.Diagnostics.PerformanceCounter.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-7.0/System.DirectoryServices.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-7.0/System.Drawing.Common.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-7.0/System.IO.Packaging.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-7.0/System.Resources.Extensions.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-7.0/System.Security.Cryptography.Pkcs.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-7.0/System.Security.Cryptography.ProtectedData.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-7.0/System.Security.Cryptography.Xml.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-7.0/System.Security.Permissions.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-7.0/System.Threading.AccessControl.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-7.0/System.Windows.Extensions.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-7.0/System.Windows.Forms.Design.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-7.0/System.Windows.Forms.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-7.0/System.Windows.Forms.Primitives.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-8.0/Microsoft.VisualBasic.Forms.json	✅Succeeded
xml/SourceLinkInformation/windowsdesktop-8.0/Microsoft.Win32.Registry.AccessControl.json	✅Succeeded

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For more details, please refer to the build report.

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[BillWagner]

This LGTM @gewarren

Let's