Bump MSTest version from 2.0.0 to 3.4.3 (#42016)

Author: Evangelink

eng/Versions.props

@@ -325,6 +325,7 @@
     <FluentAssertionsVersion>6.12.0</FluentAssertionsVersion>
     <FluentAssertionsJsonVersion>6.1.0</FluentAssertionsJsonVersion>
     <MoqPackageVersion>4.18.4</MoqPackageVersion>
+    <MSTestVersion>3.4.3</MSTestVersion>
     <XunitCombinatorialVersion>1.3.2</XunitCombinatorialVersion>
     <MicrosoftDotNetInstallerWindowsSecurityTestDataPackageVersion>8.0.0-beta.23607.1</MicrosoftDotNetInstallerWindowsSecurityTestDataPackageVersion>
   </PropertyGroup>