V13: Add support for Node.js 20 (#15022)

* update versionSpec to nodejs 20 and avoid specifying minor and patch versions to improve Azure Pipelines stability

* update engines and package lock files

* update helpful displayNames for npm builds

* add retry to counter nodejs.org timeouts

add retryCountOnTaskFailure as suggested on https://developercommunity.visualstudio.com/t/NodeTool0-task-to-install-nodejs-fails/10455454

build/azure-pipelines.yml

@@ -43,7 +43,7 @@ parameters:
     default: ' '
 
 variables:
-  nodeVersion: 18.16.x
+  nodeVersion: 20
   dotnetVersion: 8.x
   dotnetIncludePreviewVersions: true
   solution: umbraco.sln
@@ -69,6 +69,7 @@ stages:
         steps:
           - task: NodeTool@0
             displayName: Use Node.js $(nodeVersion)
+            retryCountOnTaskFailure: 3
             inputs:
               versionSpec: $(nodeVersion)
           - task: Cache@2
@@ -81,22 +82,22 @@ stages:
               path: $(npm_config_cache)
           - script: npm ci --no-fund --no-audit --prefer-offline
             workingDirectory:  src/Umbraco.Web.UI.Client
-            displayName: Run npm ci
+            displayName: Run npm ci (Backoffice)
           - task: gulp@0
-            displayName: Run gulp build
+            displayName: Run gulp build (Backoffice)
             inputs:
               gulpFile: src/Umbraco.Web.UI.Client/gulpfile.js
               targets: coreBuild
               workingDirectory: src/Umbraco.Web.UI.Client
           - task: npm@1
-            displayName: Run npm ci
+            displayName: Run npm ci (Login)
             inputs:
               command: custom
               workingDir: src/Umbraco.Web.UI.Login
               verbose: false
               customCommand: ci
           - task: npm@1
-            displayName: Run npm build
+            displayName: Run npm build (Login)
             inputs:
               command: custom
               workingDir: src/Umbraco.Web.UI.Login
@@ -190,6 +191,7 @@ stages:
         steps:
           - task: NodeTool@0
             displayName: Use Node.js 10.15.x
+            retryCountOnTaskFailure: 3
             inputs:
               versionSpec: 10.15.x # Won't work with higher versions
           - script: |
@@ -430,6 +432,7 @@ stages:
               path: $(Build.SourcesDirectory)/tests/Umbraco.Tests.AcceptanceTest/misc/nupkg
           - task: NodeTool@0
             displayName: Use Node.js $(nodeVersion)
+            retryCountOnTaskFailure: 3
             inputs:
               versionSpec: $(nodeVersion)
           - task: Cache@2