fix: simplify to PipAuthenticate with feed as primary index

The agent is network-isolated and cannot reach pypi.org. Use
PipAuthenticate with the internal feed as the primary index. This
will work once the feed's PyPI upstream source is fixed to properly
proxy public packages.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: ramsessanchez

.azure-pipelines/daily-ci-build.yml

@@ -48,17 +48,11 @@ extends:
                 inputs:
                   versionSpec: '3.12'
 
-              - script: pip install artifacts-keyring --index-url https://pypi.org/simple
-                displayName: Install Azure Artifacts keyring
-                workingDirectory: $(Build.SourcesDirectory)
-
-              - script: |
-                  mkdir -p ~/.config/pip
-                  cat > ~/.config/pip/pip.conf << 'EOF'
-                  [global]
-                  index-url=https://microsoftgraph.pkgs.visualstudio.com/0985d294-5762-4bc2-a565-161ef349ca3e/_packaging/GraphDeveloperExperiences_Public/pypi/simple/
-                  EOF
-                displayName: Configure pip to use Azure Artifacts feed
+              - task: PipAuthenticate@1
+                displayName: Authenticate with Azure Artifacts
+                inputs:
+                  artifactFeeds: microsoftgraph/GraphDeveloperExperiences_Public
+                  onlyAddExtraIndex: false
 
               - script: pip install -e ".[dev]"
                 displayName: Install dependencies