Update dependency Microsoft.NET.Test.Sdk to v17.8.0

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Microsoft.NET.Test.Sdk	17.7.2 -> 17.8.0

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Release Notes

microsoft/vstest (Microsoft.NET.Test.Sdk)

v17.8.0

What's Changed

Full Changelog: https://github.com/microsoft/vstest/compare/v17.7.2...v17.8.0

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Configuration

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