Update dependencies from https://github.com/microsoft/testfx build 20251003.5

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

@@ -4,7 +4,7 @@
     <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" />
+    <add key="darc-pub-microsoft-testfx-2bec154" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-microsoft-testfx-2bec1546/nuget/v3/index.json" />
     <!--  End: Package sources from microsoft-testfx -->
     <!--  Begin: Package sources from dotnet-aspire -->
     <!--  End: Package sources from dotnet-aspire -->

eng/Version.Details.xml

@@ -555,7 +555,7 @@
     </Dependency>
     <Dependency Name="Microsoft.Testing.Platform" Version="2.0.0">
       <Uri>https://github.com/microsoft/testfx</Uri>
-      <Sha>4117267edfb2f6b7dbfef8be013704a24cf9e8b7</Sha>
+      <Sha>2bec15462381649ff4b770577e7b8b3bbba5ea12</Sha>
     </Dependency>
     <Dependency Name="MSTest" Version="3.11.0-preview.25501.8">
       <Uri>https://github.com/microsoft/testfx</Uri>