drop python 3.8 for codegen and bump typespec-python / autorest.python (Azure#40396)

* drop python 3.8

* udpate

* udpate

* update node version

* bump typespec-python

Author: msyyc

eng/emitter-package-lock.json

@@ -1,7 +1,7 @@
 {
   "main": "dist/src/index.js",
   "dependencies": {
-    "@azure-tools/typespec-python": "0.42.2"
+    "@azure-tools/typespec-python": "0.42.3"
   },
   "devDependencies": {
     "@typespec/compiler": "^1.0.0-0",

eng/emitter-package.json

@@ -19,14 +19,14 @@ variables:
   - group: Azure SDK Auto Release Pipeline Secrets
 
 jobs:
-- job: LiveTestPython310
-  displayName: Live Test Python 3.10
+- job: LiveTestPython
+  displayName: Live Test Python
   timeoutInMinutes: 1500
   strategy:
     maxParallel: 5
   pool:
-    name: azsdk-pool-mms-ubuntu-2004-general
-    vmImage: 'ubuntu-20.04'
+    name: azsdk-pool
+    vmImage: 'ubuntu-22.04'
   variables:
     Codeql.Enabled: false
   steps:
@@ -35,6 +35,10 @@ jobs:
         versionSpec: '3.10'
         addToPath: true
         architecture: 'x64'
+    - task: NodeTool@0
+      displayName: Install Node.js
+      inputs:
+        versionSpec: 22.x
     - bash: |
         python scripts/dev_setup.py -p azure-core
         cd ..

scripts/auto_release/PythonSdkLiveTest.yml

@@ -25,18 +25,18 @@ variables:
   - group: SDK Release Helper
 
 jobs:
-- job: IssueHelper
-  displayName: IssueHelper Python 3.8
+- job: IssueHelper 3.9
+  displayName: IssueHelper Python
   timeoutInMinutes: 30
   strategy:
     maxParallel: 3
   pool:
-    name: azsdk-pool-mms-ubuntu-2004-general
-    vmImage: 'ubuntu-20.04'
+    name: azsdk-pool
+    vmImage: 'ubuntu-22.04'
   steps:
     - task: UsePythonVersion@0
       inputs:
-        versionSpec: '3.8'
+        versionSpec: '3.9'
         addToPath: true
         architecture: 'x64'
     - bash: |