Merged PR 35684: Update source build externals and add internal auth

- Please add description for changes you are making.
- If there is an issue related to this PR, please add the reference.

eng/Version.Details.xml

@@ -180,9 +180,9 @@
       <Sha>c3ad00ae84489071080a606f6a8e43c9a91a5cc2</Sha>
       <SourceBuildTarball RepoName="deployment-tools" ManagedOnly="true" />
     </Dependency>
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-externals" Version="7.0.0-alpha.1.23579.1">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-externals" Version="7.0.0-alpha.1.23579.2">
       <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-source-build-externals</Uri>
-      <Sha>5e09d1706d8d7b6dadaf767c3a4373ca68a87a32</Sha>
+      <Sha>badf0ef1064642a3047b9b720ddfec2113ffae99</Sha>
       <SourceBuild RepoName="source-build-externals" ManagedOnly="true" />
     </Dependency>
     <Dependency Name="Microsoft.SourceBuild.Intermediate.symreader" Version="1.4.0-beta2-21475-02">

src/SourceBuild/Arcade/tools/SourceBuildArcadeTarball.targets

@@ -172,8 +172,9 @@
       WorkingDirectory="$(TarballRepoSourceDir)"
       Condition="$(IsRootRepo) != 'true'" />
 
+    
     <Exec
-      Command="git submodule update --init --recursive --depth 1"
+      Command="git -c http.https://dnceng@dev.azure.com/.extraheader='AUTHORIZATION: bearer $(AzDoPat)' submodule update --init --recursive"
       WorkingDirectory="$(TarballRepoSourceDir)" />
 
     <Exec