Upgrade to Node.js 20 and remove deprecated mock server build step

- Update all pipelines to use Node 20.x instead of Node 16.x
- Remove obsolete packages/tfs-mock-server build step from common-steps.yml
- Update package.json engines to require Node >=20.0.0
- Fixes EBADENGINE warnings for shelljs, path-scurry, and system-architecture dependencies
- All 181 tests passing locally

Author: tarunramsinghani

.azure-pipelines/common-steps.yml

@@ -6,9 +6,9 @@ steps:
     clean: true
 
   - task: UseNode@1
-    displayName: Use Node 16
+    displayName: Use Node 20
     inputs:
-      version: "16.x"
+      version: "20.x"
 
   - task: NpmAuthenticate@0
     inputs:
@@ -17,12 +17,6 @@ steps:
   - script: npm i -g npm@8.19.4 --force
     displayName: Use npm version 8.19.4
 
-  - bash: |
-      cd packages/tfs-mock-server
-      npm ci
-      npm run build
-    displayName: Install and Build Mock Server
-
   - bash: |
       npm ci
       npm run build
@@ -34,7 +28,6 @@ steps:
       export TFX_TRACE="$TFX_TRACE"
       npm run test:ci
     displayName: Run Tests
-    continueOnError: true
 
   - task: PublishTestResults@2
     displayName: Publish Test Results

.azure-pipelines/release-pipeline.yml

@@ -52,11 +52,11 @@ extends:
             displayName: Publish TFX CLI to npm
             condition: eq(variables['Build.SourceBranchName'], 'master')
 
-        # Install node 16 for CodeQL 3000
+        # Install node 20 for CodeQL 3000
         - task: NodeTool@0
-          displayName: Use node 16
+          displayName: Use node 20
           inputs:
-            versionSpec: "16.x"
+            versionSpec: "20.x"
     - stage: Release
       displayName: Release to Latest
       trigger: manual
@@ -68,9 +68,9 @@ extends:
               clean: true
 
             - task: NodeTool@0
-              displayName: Use node 16
+              displayName: Use node 20
               inputs:
-                versionSpec: "16.x"
+                versionSpec: "20.x"
             - script: npm i -g npm@8.19.4 --force
               displayName: Use npm version 8.19.4
 

.vscode/settings.json

@@ -8,5 +8,6 @@
         "tmp/": true
     },
 	"editor.insertSpaces": false,
-    "typescript.tsdk": "./node_modules/typescript/lib"
+    "typescript.tsdk": "./node_modules/typescript/lib",
+    "azure-pipelines.1ESPipelineTemplatesSchemaFile": true
 }

package.json

@@ -79,7 +79,7 @@
     "typescript": "^4.9.5"
   },
   "engines": {
-    "node": ">=16.0.0"
+    "node": ">=20.0.0"
   },
   "author": "Microsoft Corporation",
   "contributors": [