chore(deps): bump NetTestSdkVersion from 17.6.2 to 17.7.0

Bumps `NetTestSdkVersion` from 17.6.2 to 17.7.0.

Updates `Microsoft.NET.Test.Sdk` from 17.6.2 to 17.7.0
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](microsoft/vstest@v17.6.2...v17.7.0)

Updates `Microsoft.TestPlatform.ObjectModel` from 17.6.2 to 17.7.0
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](microsoft/vstest@v17.6.2...v17.7.0)

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: Microsoft.TestPlatform.ObjectModel
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

test/Directory.Build.targets

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <IsPackable>false</IsPackable>
 
-    <NetTestSdkVersion>17.6.2</NetTestSdkVersion>
+    <NetTestSdkVersion>17.7.0</NetTestSdkVersion>
   </PropertyGroup>
 
   <PropertyGroup Condition="$(TargetFramework)=='netcoreapp2.1'">