Update vstest monorepo

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
Microsoft.NET.Test.Sdk	18.6.0 → 18.7.0

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Release Notes

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

v18.7.0

What's Changed

• Add ARM64 msdia140.dll support to test platform packages by @​jamesmcroft in #​15689
• Update System.Memory from 4.5.5 to 4.6.3 by @​nohwnd in #​15706

New Contributors

• @​jamesmcroft made their first contribution in #​15689

Full Changelog: microsoft/vstest@v18.6.0...v18.7.0

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