Adding buildci script to pipeline. This Pipeline exports two bundles as NuGet packages. Rather than creating one-off 'yarn bundle' scripts for each bundle, add one buildci script (#2412)

.ado/templates/win32-nuget-publish.yml

@@ -11,14 +11,9 @@ steps:
   - template: setup-repo-min-build.yml
 
   - script: |
-      yarn build
+      yarn buildci
     displayName: 'Building the repo'
 
-  - script: |
-      yarn bundle
-    workingDirectory: apps/win32
-    displayName: 'Bundling win32'
-
   # Pack the NuGet package
   - task: CmdLine@1
     displayName: 'Create NuGet package for FluentTester Win32 bundle.'