Update Microsoft.NET.Test.Sdk and Microsoft.TestPlatform versions (#16320)

Author: premun

src/Microsoft.DotNet.Arcade.Sdk/tools/DefaultVersions.props

@@ -66,13 +66,13 @@
     <DropAppVersion Condition="'$(DropAppVersion)' == ''">19.239.34923-buildid28260713</DropAppVersion>
     <MicroBuildPluginsSwixBuildVersion Condition="'$(MicroBuildPluginsSwixBuildVersion)' == ''">1.0.422</MicroBuildPluginsSwixBuildVersion>
     <MicrosoftDotNetIBCMergeVersion Condition="'$(MicrosoftDotNetIBCMergeVersion)' == ''">5.1.0-beta.21356.1</MicrosoftDotNetIBCMergeVersion>
-    <MicrosoftNETTestSdkVersion Condition="'$(MicrosoftNETTestSdkVersion)' == ''">17.12.0</MicrosoftNETTestSdkVersion>
+    <MicrosoftNETTestSdkVersion Condition="'$(MicrosoftNETTestSdkVersion)' == ''">18.0.1</MicrosoftNETTestSdkVersion>
     <MicrosoftVSSDKBuildToolsVersion Condition="'$(MicrosoftVSSDKBuildToolsVersion)' == ''">16.9.1050</MicrosoftVSSDKBuildToolsVersion>
     <MicrosoftDotnetNuGetRepackTasksVersion Condition="'$(MicrosoftDotnetNuGetRepackTasksVersion)' == ''">$(ArcadeSdkVersion)</MicrosoftDotnetNuGetRepackTasksVersion>
     <MicrosoftDotNetSignToolVersion Condition="'$(MicrosoftDotNetSignToolVersion)' == ''">$(ArcadeSdkVersion)</MicrosoftDotNetSignToolVersion>
     <MicrosoftDotNetTarVersion Condition="'$(MicrosoftDotNetTarVersion)' == ''">$(ArcadeSdkVersion)</MicrosoftDotNetTarVersion>
     <MicrosoftDotNetMacOsPkgVersion Condition="'$(MicrosoftDotNetMacOsPkgVersion)' == ''">$(ArcadeSdkVersion)</MicrosoftDotNetMacOsPkgVersion>
-    <MicrosoftTestPlatformVersion Condition="'$(MicrosoftTestPlatformVersion)' == ''">17.12.0</MicrosoftTestPlatformVersion>
+    <MicrosoftTestPlatformVersion Condition="'$(MicrosoftTestPlatformVersion)' == ''">18.0.1</MicrosoftTestPlatformVersion>
 
     <!-- Follow the instructions on how to update any of the below xunit versions: https://github.com/dotnet/arcade/blob/main/Documentation/update-xunit.md. -->
     <XUnitVersion Condition="'$(XUnitVersion)' == ''">2.9.3</XUnitVersion>