Update dependencies from https://github.com/microsoft/testfx build 20250716.15

Microsoft.Testing.Platform , MSTest
 From Version 1.8.0-preview.25364.2 -> To Version 1.8.0-preview.25366.15

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -528,13 +528,13 @@
       <Uri>https://github.com/dotnet/arcade-services</Uri>
       <Sha>afa79da3b68fd0fe48d90ea7fcbffbf7789c6d7f</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.Testing.Platform" Version="1.8.0-preview.25365.13">
+    <Dependency Name="Microsoft.Testing.Platform" Version="1.8.0-preview.25366.15">
       <Uri>https://github.com/microsoft/testfx</Uri>
-      <Sha>fdb65e26b14b3f7f44956591fb37d022c575db51</Sha>
+      <Sha>689830b314494a93b276672b70e35629d38ce639</Sha>
     </Dependency>
-    <Dependency Name="MSTest" Version="3.10.0-preview.25365.13">
+    <Dependency Name="MSTest" Version="3.10.0-preview.25366.15">
       <Uri>https://github.com/microsoft/testfx</Uri>
-      <Sha>fdb65e26b14b3f7f44956591fb37d022c575db51</Sha>
+      <Sha>689830b314494a93b276672b70e35629d38ce639</Sha>
     </Dependency>
     <Dependency Name="Microsoft.Extensions.Configuration.Ini" Version="10.0.0-preview.7.25359.101">
       <Uri>https://github.com/dotnet/dotnet</Uri>

eng/Versions.props

@@ -30,7 +30,7 @@
     <UsingToolVSSDK>true</UsingToolVSSDK>
     <FlagNetStandard1XDependencies Condition="'$(DotNetBuildSourceOnly)' == 'true'">true</FlagNetStandard1XDependencies>
     <!-- This property is only used in the dotnet test integration tests. -->
-    <MicrosoftTestingPlatformVersion>1.8.0-preview.25365.13</MicrosoftTestingPlatformVersion>
+    <MicrosoftTestingPlatformVersion>1.8.0-preview.25366.15</MicrosoftTestingPlatformVersion>
   </PropertyGroup>
   <PropertyGroup Label="Servicing version information">
     <VersionFeature21>30</VersionFeature21>
@@ -307,7 +307,7 @@
     <AwesomeAssertionsVersion>8.0.2</AwesomeAssertionsVersion>
     <AwesomeAssertionsJsonVersion>8.0.0</AwesomeAssertionsJsonVersion>
     <MoqPackageVersion>4.18.4</MoqPackageVersion>
-    <MSTestVersion>3.10.0-preview.25365.13</MSTestVersion>
+    <MSTestVersion>3.10.0-preview.25366.15</MSTestVersion>
     <XunitCombinatorialVersion>1.3.2</XunitCombinatorialVersion>
     <MicrosoftDotNetInstallerWindowsSecurityTestDataPackageVersion>8.0.0-beta.23607.1</MicrosoftDotNetInstallerWindowsSecurityTestDataPackageVersion>
     <BenchmarkDotNetPackageVersion>0.14.0</BenchmarkDotNetPackageVersion>