Reorganize build and packages to allow for omitting dev tools

New requirements in our release pipeline require us to omit the installation
of quite a few of our (optional) dev tools, as their post-install tasks
reach out to the public NPM registry and so are blocked. By moving everything
except `esbuild` and `vsce` to `optionalDependencies` (and reorganzing the
build script) we can run the linter and tests outside of the secure container.

Since OneBranch and GitHub Actions are now using PowerShell 7.4, the module
setup script had to be updated. Because OneBranch now runs without releasing,
the downloaded drop had to change (skipping a zip and extraction).

Author: andyleejordan

.pipelines/vscode-powershell-Official.yml

@@ -27,7 +27,7 @@ parameters:
 variables:
   system.debug: ${{ parameters.debug }}
   BuildConfiguration: Release
-  WindowsContainerImage: onebranch.azurecr.io/windows/ltsc2019/vse2022:latest
+  WindowsContainerImage: onebranch.azurecr.io/windows/ltsc2022/vse2022:latest
 
 resources:
   repositories:
@@ -50,6 +50,10 @@ extends:
       asyncSdl:
         enabled: true
         forStages: [build]
+    featureFlags:
+      WindowsHostVersion:
+        Version: 2022
+        Network: Netlock
     stages:
     - stage: build
       jobs:
@@ -75,30 +79,20 @@ extends:
             inputs:
               system: Custom
               customVersion: $(package.version)
-          - task: UseNode@1
-            displayName: Use Node 18.x
-            inputs:
-              version: 18.x
-          - task: PowerShell@2
-            displayName: Install PSResources
-            inputs:
-              pwsh: true
-              filePath: tools/installPSResources.ps1
           - task: DownloadPipelineArtifact@2
             displayName: Download PowerShellEditorServices
             inputs:
               source: specific
               project: PowerShellCore
               definition: 2905
               specificBuildWithTriggering: true
-              artifact: drop_release_github
-              itemPattern: PowerShellEditorServices.zip
-          - task: ExtractFiles@1
-            displayName: Extract PowerShellEditorServices module
-            inputs:
-              archiveFilePatterns: $(Pipeline.Workspace)/PowerShellEditorServices.zip
-              destinationFolder: $(Build.SourcesDirectory)/modules
-          - pwsh: Invoke-Build Build -Configuration $(BuildConfiguration)
+              branchName: refs/heads/main
+              artifact: drop_build_main
+              targetPath: $(Build.SourcesDirectory)/modules
+          - pwsh: |
+              Register-PSResourceRepository -Name GalleryFeed -Uri "https://pkgs.dev.azure.com/powershell/PowerShell/_packaging/GalleryFeed/nuget/v2" -Trusted
+              Install-Module -Repository GalleryFeed -Name InvokeBuild
+              Invoke-Build Build -Configuration $(BuildConfiguration)
             displayName: Build
           - task: onebranch.pipeline.signing@1
             displayName: Sign 1st-party example PowerShell files
@@ -141,13 +135,9 @@ extends:
               project: PowerShellCore
               definition: 2905
               specificBuildWithTriggering: true
-              artifact: drop_release_github
-              itemPattern: PowerShellEditorServices.zip
-          - task: ExtractFiles@1
-            displayName: Extract PowerShellEditorServices module
-            inputs:
-              archiveFilePatterns: $(Pipeline.Workspace)/PowerShellEditorServices.zip
-              destinationFolder: $(Build.SourcesDirectory)/modules
+              branchName: refs/heads/main
+              artifact: drop_build_main
+              targetPath: $(Build.SourcesDirectory)/modules
           - pwsh: Invoke-Build Test -Configuration $(BuildConfiguration)
             displayName: Run tests
     - stage: release