Only publish npm assets from Windows (#53254)

Author: wtgodbe

eng/Publishing.props

@@ -23,7 +23,8 @@
     <_InstallersToPublish Remove="@(_InstallersToPublish)" />
     <_InstallersToPublish Include="$(ArtifactsDir)packages\**\*.jar" UploadPathSegment="jar" />
     <_InstallersToPublish Include="$(ArtifactsDir)packages\**\*.pom" UploadPathSegment="jar" />
-    <_InstallersToPublish Include="$(ArtifactsDir)packages\**\*.tgz" UploadPathSegment="npm" />
+    <!-- All builds produce npm assets - only publish them once -->
+    <_InstallersToPublish Include="$(ArtifactsDir)packages\**\*.tgz" UploadPathSegment="npm" Condition="'$(OS)' == 'Windows_NT'" />
     <_InstallersToPublish Include="$(ArtifactsDir)installers\**\*.deb" UploadPathSegment="Runtime" />
     <_InstallersToPublish Include="$(ArtifactsDir)installers\**\*.exe" UploadPathSegment="Runtime" />
     <_InstallersToPublish Include="$(ArtifactsDir)installers\**\*.msi" UploadPathSegment="Runtime" />