Update dependencies from https://github.com/microsoft/testfx build 20251002.9

On relative base path root
Microsoft.Testing.Platform From Version 1.9.0-preview.25479.5 -> To Version 2.0.0

Author: dotnet-maestro[bot]

NuGet.config

@@ -3,6 +3,9 @@
   <packageSources>
     <clear />
     <!--Begin: Package sources managed by Dependency Flow automation. Do not edit the sources below.-->
+    <!--  Begin: Package sources from microsoft-testfx -->
+    <add key="darc-pub-microsoft-testfx-4117267" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-microsoft-testfx-4117267e/nuget/v3/index.json" />
+    <!--  End: Package sources from microsoft-testfx -->
     <!--  Begin: Package sources from dotnet-aspire -->
     <!--  End: Package sources from dotnet-aspire -->
     <!--  Begin: Package sources from dotnet-runtime -->

eng/Version.Details.props

@@ -140,7 +140,7 @@ This file should be imported by eng/Versions.props
     <!-- dotnet/core-setup dependencies -->
     <NETStandardLibraryRefPackageVersion>2.1.0</NETStandardLibraryRefPackageVersion>
     <!-- microsoft/testfx dependencies -->
-    <MicrosoftTestingPlatformPackageVersion>1.9.0-preview.25501.8</MicrosoftTestingPlatformPackageVersion>
+    <MicrosoftTestingPlatformPackageVersion>2.0.0</MicrosoftTestingPlatformPackageVersion>
     <MSTestPackageVersion>3.11.0-preview.25501.8</MSTestPackageVersion>
   </PropertyGroup>
   <!--Property group for alternate package version names-->

eng/Version.Details.xml

@@ -553,9 +553,9 @@
       <Uri>https://github.com/dotnet/dotnet</Uri>
       <Sha>6befeceeaece5c9cb9730878aeaf4667f7c29b70</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.Testing.Platform" Version="1.9.0-preview.25501.8">
+    <Dependency Name="Microsoft.Testing.Platform" Version="2.0.0">
       <Uri>https://github.com/microsoft/testfx</Uri>
-      <Sha>a4d4392703e56994925d8fa625219b11e6cd4837</Sha>
+      <Sha>4117267edfb2f6b7dbfef8be013704a24cf9e8b7</Sha>
     </Dependency>
     <Dependency Name="MSTest" Version="3.11.0-preview.25501.8">
       <Uri>https://github.com/microsoft/testfx</Uri>