[release/8.0] Update dependencies from dotnet/source-build-reference-packages (#63261)

* Update dependencies from https://github.com/dotnet/source-build-reference-packages build 20250814.2

Microsoft.SourceBuild.Intermediate.source-build-reference-packages
 From Version 8.0.0-alpha.1.25316.2 -> To Version 8.0.0-alpha.1.25414.2

* Update dependencies from https://github.com/dotnet/source-build-reference-packages build 20250828.6

Microsoft.SourceBuild.Intermediate.source-build-reference-packages
 From Version 8.0.0-alpha.1.25316.2 -> To Version 8.0.0-alpha.1.25428.6

---------

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

NuGet.config

@@ -6,14 +6,8 @@
     <!--  Begin: Package sources from dotnet-extensions -->
     <!--  End: Package sources from dotnet-extensions -->
     <!--  Begin: Package sources from dotnet-efcore -->
-    <add key="darc-int-dotnet-efcore-24e93fc" value="https://pkgs.dev.azure.com/dnceng/internal/_packaging/darc-int-dotnet-efcore-24e93fcb/nuget/v3/index.json" />
-    <add key="darc-int-dotnet-efcore-24e93fc-2" value="https://pkgs.dev.azure.com/dnceng/internal/_packaging/darc-int-dotnet-efcore-24e93fcb-2/nuget/v3/index.json" />
-    <add key="darc-int-dotnet-efcore-24e93fc-1" value="https://pkgs.dev.azure.com/dnceng/internal/_packaging/darc-int-dotnet-efcore-24e93fcb-1/nuget/v3/index.json" />
     <!--  End: Package sources from dotnet-efcore -->
     <!--  Begin: Package sources from dotnet-runtime -->
-    <add key="darc-int-dotnet-runtime-fce8ed9" value="https://pkgs.dev.azure.com/dnceng/internal/_packaging/darc-int-dotnet-runtime-fce8ed90/nuget/v3/index.json" />
-    <add key="darc-int-dotnet-runtime-fce8ed9-2" value="https://pkgs.dev.azure.com/dnceng/internal/_packaging/darc-int-dotnet-runtime-fce8ed90-2/nuget/v3/index.json" />
-    <add key="darc-int-dotnet-runtime-fce8ed9-1" value="https://pkgs.dev.azure.com/dnceng/internal/_packaging/darc-int-dotnet-runtime-fce8ed90-1/nuget/v3/index.json" />
     <!--  End: Package sources from dotnet-runtime -->
     <!--End: Package sources managed by Dependency Flow automation. Do not edit the sources above.-->
     <add key="dotnet-eng" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-eng/nuget/v3/index.json" />
@@ -34,14 +28,8 @@
     <clear />
     <!--Begin: Package sources managed by Dependency Flow automation. Do not edit the sources below.-->
     <!--  Begin: Package sources from dotnet-efcore -->
-    <add key="darc-int-dotnet-efcore-24e93fc-1" value="true" />
-    <add key="darc-int-dotnet-efcore-24e93fc-2" value="true" />
-    <add key="darc-int-dotnet-efcore-24e93fc" value="true" />
     <!--  End: Package sources from dotnet-efcore -->
     <!--  Begin: Package sources from dotnet-runtime -->
-    <add key="darc-int-dotnet-runtime-fce8ed9-1" value="true" />
-    <add key="darc-int-dotnet-runtime-fce8ed9-2" value="true" />
-    <add key="darc-int-dotnet-runtime-fce8ed9" value="true" />
     <!--  End: Package sources from dotnet-runtime -->
     <!--End: Package sources managed by Dependency Flow automation. Do not edit the sources above.-->
   </disabledPackageSources>

eng/Version.Details.xml

@@ -338,9 +338,9 @@
       <Sha>9a1c3e1b7f0c8763d4c96e593961a61a72679a7b</Sha>
       <SourceBuild RepoName="xdt" ManagedOnly="true" />
     </Dependency>
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="8.0.0-alpha.1.25316.2">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="8.0.0-alpha.1.25428.6">
       <Uri>https://github.com/dotnet/source-build-reference-packages</Uri>
-      <Sha>3827e68e002064268d4be4b2d1d96048f9794808</Sha>
+      <Sha>0b4984f8ee945e02a39ef0f72dc9f7ceab65c14f</Sha>
       <SourceBuild RepoName="source-build-reference-packages" ManagedOnly="true" />
     </Dependency>
     <!-- Not updated automatically -->

eng/Versions.props

@@ -168,7 +168,7 @@
     <!-- Packages from dotnet/source-build-externals -->
     <MicrosoftSourceBuildIntermediatesourcebuildexternalsVersion>8.0.0-alpha.1.25202.2</MicrosoftSourceBuildIntermediatesourcebuildexternalsVersion>
     <!-- Packages from dotnet/source-build-reference-packages -->
-    <MicrosoftSourceBuildIntermediatesourcebuildreferencepackagesVersion>8.0.0-alpha.1.25316.2</MicrosoftSourceBuildIntermediatesourcebuildreferencepackagesVersion>
+    <MicrosoftSourceBuildIntermediatesourcebuildreferencepackagesVersion>8.0.0-alpha.1.25428.6</MicrosoftSourceBuildIntermediatesourcebuildreferencepackagesVersion>
     <!-- Packages from dotnet/symreader -->
     <MicrosoftSourceBuildIntermediatesymreaderVersion>2.0.0-beta-23228-03</MicrosoftSourceBuildIntermediatesymreaderVersion>
     <!-- Packages from dotnet/runtime -->