[release/8.0] Update dependencies from dotnet/source-build-externals (dotnet#55691)

* Update dependencies from https://github.com/dotnet/source-build-externals build 20240513.1

Microsoft.SourceBuild.Intermediate.source-build-externals
 From Version 8.0.0-alpha.1.24256.1 -> To Version 8.0.0-alpha.1.24263.1

* Update dependencies from https://github.com/dotnet/source-build-externals build 20240519.1

Microsoft.SourceBuild.Intermediate.source-build-externals
 From Version 8.0.0-alpha.1.24256.1 -> To Version 8.0.0-alpha.1.24269.1

---------

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

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -189,9 +189,9 @@
       <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-runtime</Uri>
       <Sha>087e15321bb712ef6fe8b0ba6f8bd12facf92629</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-externals" Version="8.0.0-alpha.1.24256.1">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-externals" Version="8.0.0-alpha.1.24269.1">
       <Uri>https://github.com/dotnet/source-build-externals</Uri>
-      <Sha>2b7510ccda2be01e2a2b48598498dca24fb69c3a</Sha>
+      <Sha>4f2151df120194f0268944f1b723c14820738fc8</Sha>
       <SourceBuild RepoName="source-build-externals" ManagedOnly="true" />
     </Dependency>
     <Dependency Name="Microsoft.SourceBuild.Intermediate.symreader" Version="2.0.0-beta-23228-03">

eng/Versions.props

@@ -166,7 +166,7 @@
     <MicrosoftDotNetBuildTasksTemplatingVersion>8.0.0-beta.24266.3</MicrosoftDotNetBuildTasksTemplatingVersion>
     <MicrosoftDotNetRemoteExecutorVersion>8.0.0-beta.24266.3</MicrosoftDotNetRemoteExecutorVersion>
     <!-- Packages from dotnet/source-build-externals -->
-    <MicrosoftSourceBuildIntermediatesourcebuildexternalsVersion>8.0.0-alpha.1.24256.1</MicrosoftSourceBuildIntermediatesourcebuildexternalsVersion>
+    <MicrosoftSourceBuildIntermediatesourcebuildexternalsVersion>8.0.0-alpha.1.24269.1</MicrosoftSourceBuildIntermediatesourcebuildexternalsVersion>
     <!-- Packages from dotnet/source-build-reference-packages -->
     <MicrosoftSourceBuildIntermediatesourcebuildreferencepackagesVersion>8.0.0-alpha.1.24257.2</MicrosoftSourceBuildIntermediatesourcebuildreferencepackagesVersion>
     <!-- Packages from dotnet/symreader -->