support both qnn x64 and arm64ec stages in py packaging pipeline (#21880)

both arm64ec and x64 packages are needed.  
x64 is needed for offline context binary generation
and arm64ec is needed for interop with python packages that don't have
prebuilt arm64 packages and only have x64.

tools/ci_build/github/azure-pipelines/py-packaging-pipeline.yml

@@ -34,6 +34,11 @@ parameters:
   type: boolean
   default: true
 
+- name: enable_windows_arm64ec_qnn
+  displayName: 'Whether Windows ARM64EC package with QNN EP is built.'
+  type: boolean
+  default: true
+
 - name: enable_windows_x64_qnn
   displayName: 'Whether Windows x86_64 package with QNN EP is built.'
   type: boolean
@@ -73,6 +78,7 @@ stages:
     enable_mac_cpu: ${{ parameters.enable_mac_cpu }}
     enable_linux_arm: ${{ parameters.enable_linux_arm }}
     enable_windows_arm64_qnn: ${{ parameters.enable_windows_arm64_qnn }}
+    enable_windows_arm64ec_qnn: ${{ parameters.enable_windows_arm64ec_qnn }}
     enable_windows_x64_qnn: ${{ parameters.enable_windows_x64_qnn }}
     build_py_parameters: ${{ parameters.build_py_parameters }}
     cmake_build_type: ${{ parameters.cmake_build_type }}

tools/ci_build/github/azure-pipelines/templates/py-packaging-stage.yml

@@ -40,6 +40,11 @@ parameters:
   type: boolean
   default: true
 
+- name: enable_windows_arm64ec_qnn
+  displayName: 'Whether Windows ARM64EC package with QNN EP is built.'
+  type: boolean
+  default: true
+
 - name: enable_windows_x64_qnn
   displayName: 'Whether Windows x86_64 package with QNN EP is built.'
   type: boolean
@@ -512,8 +517,8 @@ stages:
           PYTHON_VERSION: '3.11'
           BUILD_PY_PARAMETERS: ${{ parameters.build_py_parameters }}
 
-  - ${{ if eq(parameters.enable_windows_x64_qnn, true) }}:
-    - stage: Python_Packaging_Windows_x64_QNN
+  - ${{ if eq(parameters.enable_windows_arm64ec_qnn, true) }}:
+    - stage: Python_Packaging_Windows_arm64ec_QNN
       dependsOn: []
       jobs:
         - template: py-win-arm64ec-qnn.yml
@@ -521,3 +526,13 @@ stages:
             MACHINE_POOL: 'Onnxruntime-QNNEP-Windows-2022-CPU'
             QNN_SDK: ${{ parameters.qnn_sdk_version }}
             BUILD_PY_PARAMETERS: ${{ parameters.build_py_parameters }}
+
+  - ${{ if eq(parameters.enable_windows_x64_qnn, true) }}:
+    - stage: Python_Packaging_Windows_x64_QNN
+      dependsOn: []
+      jobs:
+        - template: py-win-x64-qnn.yml
+          parameters:
+            MACHINE_POOL: 'Onnxruntime-QNNEP-Windows-2022-CPU'
+            QNN_SDK: ${{ parameters.qnn_sdk_version }}
+            BUILD_PY_PARAMETERS: ${{ parameters.build_py_parameters }}

tools/ci_build/github/azure-pipelines/templates/py-win-x64-qnn.yml

@@ -135,7 +135,7 @@ jobs:
       - task: PublishBuildArtifacts@1
         displayName: 'Publish Artifact: ONNXRuntime python wheel'
         inputs:
-          ArtifactName: onnxruntime_qnn
+          ArtifactName: onnxruntime_qnn_x64
 
       - script: |
           7z x *.whl