Use internal NuGet feed for release builds

eng/pipelines/NuGet.release.config

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- This NuGet config is used by release builds only (VS, VSCode, DebuggerTesting).
+     Release pipelines run under CFSClean network isolation policies which block direct
+     access to api.nuget.org. The MIEngine-Dependencies feed upstreams nuget.org through
+     the CFS-compliant internal path. CI and local builds use src/.nuget/NuGet.config
+     which restores directly from nuget.org. -->
+<configuration>
+  <packageSources>
+    <clear />
+    <add key="MIEngine-Dependencies" value="https://pkgs.dev.azure.com/devdiv/DevDiv/_packaging/MIEngine-Dependencies/nuget/v3/index.json" />
+  </packageSources>
+</configuration>

eng/pipelines/steps/BuildSolution.yml

@@ -5,14 +5,15 @@ parameters:
   Configuration: 'Release'
   BuildArguments: ''
   OneESPT: false
+  NuGetConfigPath: '$(Build.SourcesDirectory)/src/.nuget/NuGet.config'
 
 steps:
 - template: ../tasks/NuGetCommand.yml
   parameters:
     Command: 'restore'
     solution: ${{ parameters.Solution }}
     selectOrConfig: 'config'
-    NugetConfigPath: '$(Build.SourcesDirectory)/src/.nuget/NuGet.config'
+    NugetConfigPath: '${{ parameters.NuGetConfigPath }}'
 
 # If running under System.Debug (Enable system diagnostics), enable binlogs
 - script: |

eng/pipelines/templates/Build.template.yml

@@ -19,6 +19,7 @@ steps:
   parameters:
     Configuration: ${{ parameters.Configuration }}
     OneESPT: false
+    NuGetConfigPath: '$(Build.SourcesDirectory)/eng/pipelines/NuGet.release.config'
 
 - template: ../tasks/CSharp.yml
 

eng/pipelines/templates/DebuggerTesting-release.template.yml

@@ -11,7 +11,7 @@ steps:
     Command: 'restore'
     solution: '$(Build.SourcesDirectory)\src\MIDebugEngine.sln'
     FeedsToUse: 'config'
-    NugetConfigPath: '$(Build.SourcesDirectory)\src\.nuget\NuGet.config'
+    NugetConfigPath: '$(Build.SourcesDirectory)\eng\pipelines\NuGet.release.config'
 
 - template: ../tasks/MSBuild.yml
   parameters:

eng/pipelines/templates/VS-release.template.yml

@@ -13,6 +13,7 @@ steps:
     Configuration: 'Lab.Release'
     BuildArguments: /p:NuGetPath=$(NuGetExeToolPath) /p:NuGetPrerelease=false
     OneESPT: true
+    NuGetConfigPath: '$(Build.SourcesDirectory)/eng/pipelines/NuGet.release.config'
 
 - template: ../steps/CollectAndPublishBinaries.yml
   parameters:

eng/pipelines/templates/VSCode-release.template.yml

@@ -14,6 +14,7 @@ steps:
   parameters:
     Configuration: 'Lab.Release'
     OneESPT: true
+    NuGetConfigPath: '$(Build.SourcesDirectory)/eng/pipelines/NuGet.release.config'
 
 - template: ../steps/CollectAndPublishBinaries.yml
   parameters: