update pipline python version from 3.8 to 3.12 (#22517)

### Description
As the python3.8 is going to reach EOL. 

https://discuss.python.org/t/python-3-13-0-final-has-been-released/
https://discuss.python.org/t/python-3-8-is-now-officially-eol/66983

we update our ci pipeline python version which still using 3.8 to 3.12

tools/ci_build/github/azure-pipelines/nuget/templates/test_win.yml

@@ -40,7 +40,7 @@ stages:
     steps:
     - task: UsePythonVersion@0
       inputs:
-        versionSpec: '3.8'
+        versionSpec: '3.12'
         addToPath: true
         architecture: x64
 

tools/ci_build/github/azure-pipelines/post-merge-jobs.yml

@@ -377,7 +377,7 @@ stages:
 
     - task: UsePythonVersion@0
       inputs:
-        versionSpec: '3.8'
+        versionSpec: '3.12'
         addToPath: true
         architecture: x64
 
@@ -411,7 +411,7 @@ stages:
     steps:
     - task: UsePythonVersion@0
       inputs:
-        versionSpec: "3.9"
+        versionSpec: "3.12"
         addToPath: true
         architecture: "x64"
 
@@ -447,7 +447,7 @@ stages:
     steps:
     - task: UsePythonVersion@0
       inputs:
-        versionSpec: "3.9"
+        versionSpec: "3.12"
         addToPath: true
         architecture: "x64"
 

tools/ci_build/github/azure-pipelines/rocm-nuget-packaging-pipeline.yml

@@ -255,7 +255,7 @@ stages:
     - task: UsePythonVersion@0
       displayName: 'Use Python'
       inputs:
-        versionSpec: 3.8
+        versionSpec: 3.12
 
     - task: MSBuild@1
       displayName: 'Build Nuget Packages'

tools/ci_build/github/azure-pipelines/stages/nuget-cuda-packaging-stage.yml

@@ -135,7 +135,7 @@ stages:
         - task: UsePythonVersion@0
           displayName: 'Use Python'
           inputs:
-            versionSpec: 3.8
+            versionSpec: 3.12
 
         - task: MSBuild@1
           displayName: 'Build Nuget Packages'

tools/ci_build/github/azure-pipelines/templates/c-api-cpu.yml

@@ -446,7 +446,7 @@ stages:
     - task: UsePythonVersion@0
       displayName: 'Use Python'
       inputs:
-        versionSpec: 3.8
+        versionSpec: 3.12
 
     - task: MSBuild@1
       displayName: 'Build Nuget Packages'

tools/ci_build/github/azure-pipelines/templates/linux-wasm-ci.yml

@@ -73,7 +73,7 @@ jobs:
     displayName: 'Checkout submodules'
   - task: UsePythonVersion@0
     inputs:
-      versionSpec: '3.8'
+      versionSpec: '3.12'
       addToPath: true
       architecture: $(buildArch)
   - template: download-deps.yml

tools/ci_build/github/azure-pipelines/templates/ondevice-training-cpu-packaging-pipeline.yml

@@ -233,7 +233,7 @@ stages:
     - task: UsePythonVersion@0
       displayName: 'Use Python'
       inputs:
-        versionSpec: 3.8
+        versionSpec: 3.12
 
     - task: MSBuild@1
       displayName: 'Build Nuget Packages'

tools/ci_build/github/azure-pipelines/templates/publish-nuget-steps.yml

@@ -34,7 +34,7 @@ stages:
 
     - task: UsePythonVersion@0
       inputs:
-        versionSpec: '3.9'
+        versionSpec: '3.12'
         addToPath: true
 
     - template: set-version-number-variables-step.yml

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

@@ -1,6 +1,6 @@
 parameters:
   QnnSdk: '2.27.0.240926'
-  build_config: 'RelWithDebInfo'  
+  build_config: 'RelWithDebInfo'
   IsReleaseBuild: false
   DoEsrp: false
   qnn_ep_build_pool_name: 'Onnxruntime-QNNEP-Windows-2022-CPU'
@@ -32,9 +32,9 @@ stages:
 
       - task: UsePythonVersion@0
         inputs:
-          versionSpec: '3.8'
+          versionSpec: '3.12'
           addToPath: true
-      
+
       - template: jobs/download_win_qnn_sdk.yml
         parameters:
           QnnSDKVersion: ${{ parameters.QnnSdk }}
@@ -44,7 +44,7 @@ stages:
         inputs:
           scriptPath: '$(Build.SourcesDirectory)\tools\ci_build\build.py'
           arguments: '--use_qnn --qnn_home $(QnnSDKRootDir) $(commonBuildArgs)'
-          
+
       - task: VSBuild@1
         displayName: 'Build onnxruntime'
         inputs:

tools/ci_build/github/azure-pipelines/templates/react-native-ci.yml

@@ -23,7 +23,7 @@ parameters:
   displayName: 'Stage that the initial stage of react-native-ci depends on'
   type: string
   default: ''
-  
+
 - name: enable_code_sign
   displayName: Use GPG to sign the jars
   type: boolean
@@ -58,9 +58,9 @@ stages:
     steps:
     - template: use-xcode-version.yml
     - task: UsePythonVersion@0
-      displayName: Use python 3.9
+      displayName: Use python 3.12
       inputs:
-        versionSpec: "3.9"
+        versionSpec: "3.12"
         addToPath: true
         architecture: "x64"
 
@@ -113,9 +113,9 @@ stages:
       condition: always()
     - template: use-xcode-version.yml
     - task: UsePythonVersion@0
-      displayName: Use python 3.9
+      displayName: Use python 3.12
       inputs:
-        versionSpec: "3.9"
+        versionSpec: "3.12"
         addToPath: true
         architecture: "x64"
 

tools/ci_build/github/azure-pipelines/templates/stages/mac-ios-packaging-build-stage.yml

@@ -62,7 +62,7 @@ stages:
 
     - task: UsePythonVersion@0
       inputs:
-        versionSpec: "3.9"
+        versionSpec: "3.12"
         addToPath: true
         architecture: "x64"
 

tools/ci_build/github/azure-pipelines/templates/validate-package.yml

@@ -11,11 +11,11 @@ steps:
     - task: UsePythonVersion@0
       displayName: 'Use Python'
       inputs:
-        versionSpec: 3.8
+        versionSpec: 3.12
 
     - task: PythonScript@0
       displayName: 'Validate Package'
       inputs:
         scriptPath: '${{parameters.ScriptPath}}'
         arguments: '--package_type ${{parameters.PackageType}} --package_name ${{parameters.PackageName}} --package_path ${{parameters.PackagePath}} --platforms_supported ${{parameters.PlatformsSupported}} --verify_nuget_signing ${{parameters.VerifyNugetSigning}}'
-        workingDirectory: ${{parameters.workingDirectory}} 
+        workingDirectory: ${{parameters.workingDirectory}}

tools/ci_build/github/azure-pipelines/templates/win-ci.yml

@@ -360,7 +360,7 @@ stages:
 
         - task: UsePythonVersion@0
           inputs:
-            versionSpec: '3.8'
+            versionSpec: '3.12'
             addToPath: true
             architecture: ${{ parameters.buildArch }}
 
@@ -397,4 +397,4 @@ stages:
             parameters:
               msbuildPlatform: ${{ parameters.msbuildPlatform }}
               java_artifact_id: ${{ parameters.java_artifact_id }}
-              buildOnly: false
+              buildOnly: false

tools/ci_build/github/azure-pipelines/templates/win-wasm-ci.yml

@@ -76,7 +76,7 @@ jobs:
     displayName: 'Checkout submodules'
   - task: UsePythonVersion@0
     inputs:
-      versionSpec: '3.8'
+      versionSpec: '3.12'
       addToPath: true
       architecture: $(buildArch)
   - task: NodeTool@0

tools/ci_build/github/azure-pipelines/win-qnn-ci-pipeline.yml

@@ -54,7 +54,7 @@ jobs:
 
   - task: UsePythonVersion@0
     inputs:
-      versionSpec: '3.8'
+      versionSpec: '3.12'
       addToPath: true
       architecture: $(buildArch)