Fix typewriter/kiota CFS nuget.config ordering (CFSClean)

The typewriter/kiota nuget.config was created in the job before build-and-publish-typewriter.yml runs 'checkout: self', which cleans the sources dir and wiped the untracked config -> dotnet build restored from nuget.org (22 api.nuget.org hits in build_and_publish_typewriter).

Move the CFS config creation to the reusable create-cfs-nuget-config.yml (writes to Agent.TempDirectory, checkout-proof). For typewriter, create it AFTER 'checkout: self' and restore via -p:RestoreConfigFile. For kiota, pass --configfile to the tool install. Remove the now-redundant inline NuGetAuthenticate/create-config steps from generation-pipeline.yml.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Copilot-Session: d3f8fec7-b00b-46be-ba39-7e1f3e7f7188

Author: gavinbarron

.azure-pipelines/generation-pipeline.yml

@@ -201,20 +201,6 @@ extends:
             targetPath: '$(Build.ArtifactStagingDirectory)'
             artifactName: typewriter
         steps:
-        - task: NuGetAuthenticate@1
-          displayName: 'Authenticate to Azure Artifacts'
-
-        - pwsh: |
-            @"
-            <?xml version="1.0" encoding="utf-8"?>
-            <configuration>
-              <packageSources>
-                <clear />
-                <add key="GraphDeveloperExperiences_Public" value="https://microsoftgraph.pkgs.visualstudio.com/0985d294-5762-4bc2-a565-161ef349ca3e/_packaging/GraphDeveloperExperiences_Public/nuget/v3/index.json" />
-              </packageSources>
-            </configuration>
-            "@ | Set-Content -Path "$(Build.SourcesDirectory)/nuget.config" -Encoding UTF8
-          displayName: 'Create nuget.config (central feed)'
         - template: /.azure-pipelines/generation-templates/build-and-publish-typewriter.yml@self
     - stage: stage_build_and_publish_kiota
       dependsOn: [] # remove the implicit dependency to any previous stage
@@ -226,20 +212,7 @@ extends:
             targetPath: '$(Build.ArtifactStagingDirectory)'
             artifactName: kiota
         steps:
-        - task: NuGetAuthenticate@1
-          displayName: 'Authenticate to Azure Artifacts'
-
-        - pwsh: |
-            @"
-            <?xml version="1.0" encoding="utf-8"?>
-            <configuration>
-              <packageSources>
-                <clear />
-                <add key="GraphDeveloperExperiences_Public" value="https://microsoftgraph.pkgs.visualstudio.com/0985d294-5762-4bc2-a565-161ef349ca3e/_packaging/GraphDeveloperExperiences_Public/nuget/v3/index.json" />
-              </packageSources>
-            </configuration>
-            "@ | Set-Content -Path "$(Build.SourcesDirectory)/nuget.config" -Encoding UTF8
-          displayName: 'Create nuget.config (central feed)'
+        - template: /.azure-pipelines/generation-templates/create-cfs-nuget-config.yml@self
         - template: /.azure-pipelines/generation-templates/build-and-publish-kiota.yml@self
 # Downloads the latest public beta metadata. If there are changes, we checkin
 # the public metadata into microsoftgraph/msgraph-metadata, and then run the

.azure-pipelines/generation-templates/build-and-publish-kiota.yml

@@ -1,5 +1,6 @@
 steps:
 - pwsh: |
     dotnet tool install Microsoft.OpenApi.Kiota `
-          --tool-path "$(Build.ArtifactStagingDirectory)"
+          --tool-path "$(Build.ArtifactStagingDirectory)" `
+          --configfile "$(Agent.TempDirectory)/nuget.config"
   displayName: 'Install Kiota via dotnet tool'

.azure-pipelines/generation-templates/build-and-publish-typewriter.yml

@@ -6,7 +6,11 @@ steps:
   submodules: recursive
   persistCredentials: true
 
-- pwsh: dotnet build $(Build.SourcesDirectory)/src/Typewriter/Typewriter.csproj --configuration $(buildConfiguration)
+# Create the CFS nuget.config AFTER checkout (a checkout clean would wipe a config written
+# into the sources dir) and restore against it, so dotnet build does not reach nuget.org.
+- template: /.azure-pipelines/generation-templates/create-cfs-nuget-config.yml@self
+
+- pwsh: dotnet build $(Build.SourcesDirectory)/src/Typewriter/Typewriter.csproj --configuration $(buildConfiguration) -p:RestoreConfigFile="$(Agent.TempDirectory)/nuget.config"
   displayName: 'Build Typewriter'
 
 - task: CopyFiles@2