Bump Package validation baseline version to 9.7.0

[Copilot]

This PR updates the package validation baseline version from 9.6.0 to 9.7.0 following the recent 9.7.0 release of packages in this repository.

Changes Made

1. Removed ApiCompatBaselineVersion property from eng/Versions.props

   • This property was only used to set PackageValidationBaselineVersion and served no other purpose

2. Updated PackageValidationBaselineVersion in eng/MSBuild/Packaging.targets

   • Changed from $(ApiCompatBaselineVersion) to directly use 9.7.0
   • This ensures package validation will baseline against the 9.7.0 release to prevent API breaking changes

Impact

This change ensures that:

• Package validation will now use 9.7.0 as the baseline for compatibility checks
• No API breaking changes can be introduced relative to the 9.7.0 release
• The unused ApiCompatBaselineVersion property is removed, simplifying the build configuration

Fixes #6649.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• vwvvsblobprodcus334.vsblob.vsassets.io
  • Triggering command: /home/REDACTED/work/extensions/extensions/.dotnet/dotnet msbuild /m /nologo /clp:Summary /v:minimal /nr:true /p:TreatWarningsAsErrors=false /p:ContinuousIntegrationBuild=false /home/REDACTED/work/extensions/extensions/artifacts/toolset/restore.proj /t:__WriteToolsetLocation /clp:ErrorsOnly;NoSummary /p:__ToolsetLocationOutputFile=/home/REDACTED/work/extensions/extensions/artifacts/toolset/9.0.0-beta.25366.1.txt (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

---

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[Copilot]

Pull Request Overview

This PR updates the package validation baseline version from 9.6.0 to 9.7.0 to align with the recent 9.7.0 release and simplifies the build configuration by removing an unused property.

• Removed the ApiCompatBaselineVersion property from eng/Versions.props as it was only used to set the package validation baseline
• Updated PackageValidationBaselineVersion to directly use "9.7.0" instead of referencing the removed property

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
eng/Versions.props	Removes the unused ApiCompatBaselineVersion property
eng/MSBuild/Packaging.targets	Updates PackageValidationBaselineVersion to use hardcoded "9.7.0" value