chore(deps): update vstest monorepo to v17.8.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Microsoft.NET.Test.Sdk	17.7.2 -> 17.8.0
Microsoft.TestPlatform	17.7.2 -> 17.8.0
Microsoft.TestPlatform.ObjectModel	17.7.2 -> 17.8.0
Microsoft.TestPlatform.Portable	17.7.2 -> 17.8.0
Microsoft.TestPlatform.TranslationLayer	17.7.2 -> 17.8.0

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Release Notes

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

### [`v17.8.0`](https://togithub.com/microsoft/vstest/releases/tag/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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🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about these updates again.

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