Update dependencies from https://github.com/dotnet/extensions build 20250510.2 (#61877)

Microsoft.Extensions.Diagnostics.Testing , Microsoft.Extensions.TimeProvider.Testing
 From Version 9.5.0-preview.1.25252.3 -> To Version 9.6.0-preview.1.25260.2

Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -414,13 +414,13 @@
       <Uri>https://github.com/dotnet/arcade</Uri>
       <Sha>bfbc858ba868b60fffaf7b2150f1d2165b01e786</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.Extensions.Diagnostics.Testing" Version="9.5.0-preview.1.25252.3">
+    <Dependency Name="Microsoft.Extensions.Diagnostics.Testing" Version="9.6.0-preview.1.25260.2">
       <Uri>https://github.com/dotnet/extensions</Uri>
-      <Sha>9652f798f2de4e40c088075d00d185628c8e3dbb</Sha>
+      <Sha>90dd3fdbb6056d8ae177ab102b779e3922a88981</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.Extensions.TimeProvider.Testing" Version="9.5.0-preview.1.25252.3">
+    <Dependency Name="Microsoft.Extensions.TimeProvider.Testing" Version="9.6.0-preview.1.25260.2">
       <Uri>https://github.com/dotnet/extensions</Uri>
-      <Sha>9652f798f2de4e40c088075d00d185628c8e3dbb</Sha>
+      <Sha>90dd3fdbb6056d8ae177ab102b779e3922a88981</Sha>
     </Dependency>
     <Dependency Name="NuGet.Frameworks" Version="6.2.4">
       <Uri>https://github.com/nuget/nuget.client</Uri>

eng/Versions.props

@@ -143,8 +143,8 @@
     <SystemIOHashingVersion>9.0.4</SystemIOHashingVersion>
     <SystemRuntimeCachingVersion>9.0.4</SystemRuntimeCachingVersion>
     <!-- Packages from dotnet/extensions -->
-    <MicrosoftExtensionsDiagnosticsTestingVersion>9.5.0-preview.1.25252.3</MicrosoftExtensionsDiagnosticsTestingVersion>
-    <MicrosoftExtensionsTimeProviderTestingVersion>9.5.0-preview.1.25252.3</MicrosoftExtensionsTimeProviderTestingVersion>
+    <MicrosoftExtensionsDiagnosticsTestingVersion>9.6.0-preview.1.25260.2</MicrosoftExtensionsDiagnosticsTestingVersion>
+    <MicrosoftExtensionsTimeProviderTestingVersion>9.6.0-preview.1.25260.2</MicrosoftExtensionsTimeProviderTestingVersion>
     <!-- Packages from dotnet/efcore -->
     <dotnetefVersion>9.0.4</dotnetefVersion>
     <MicrosoftEntityFrameworkCoreInMemoryVersion>9.0.4</MicrosoftEntityFrameworkCoreInMemoryVersion>