Update Testing framework to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
xunit.v3.core.mtp-v2	3.2.2 → 4.0.0
xunit.v3.mtp-v2	3.2.2 → 4.0.0

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Pull request overview

This PR updates the centralized test runner package versions used by the repository’s xUnit v3 + Microsoft.Testing.Platform (MTP v2) setup, moving to the new major release of the xunit.v3.*mtp-v2 packages.

Changes:

• Bump xunit.v3.core.mtp-v2 from 3.2.2 to 4.0.0.
• Bump xunit.v3.mtp-v2 from 3.2.2 to 4.0.0.

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Pull request overview

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

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🔵 Needs a closer look

A major-version test framework runner upgrade can introduce breaking behavioral changes that should be validated by a full test run/CI before merging.

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🟡 Changes recommended

The package updates cause restore/build failures for existing net472 targets.

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• Files reviewed: 1/1 changed files
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