Temporarily disable prerequisite enforcements on CI or non Windows configurations

Author: javiercn

src/Shared/E2ETesting/E2ETesting.props

@@ -2,6 +2,8 @@
   <PropertyGroup>
     <_DefaultProjectFilter>$(MSBuildProjectDirectory)\..\..</_DefaultProjectFilter>
     <DefaultItemExcludes>$(DefaultItemExcludes);node_modules\**</DefaultItemExcludes>
+    <EnforcePrerequisites Condition="'$(EnforcePrerequisites)' == '' and '$(CI)' != 'true' and '$(OS)' == 'Windows_NT'">True</EnforcePrerequisites>
+
     <!-- WebDriver is not strong-named, so this test project cannot be strong named either. -->
     <SignAssembly>false</SignAssembly>
   </PropertyGroup>

src/Shared/E2ETesting/E2ETesting.targets

@@ -11,7 +11,7 @@
 
   <!-- Running prerequisites -->
 
-  <Target Name="EnsurePrerequisites" BeforeTargets="EnsureNodeJSRestored">
+  <Target Name="EnsurePrerequisites" Condition="'$(EnforcePrerequisites)' == 'True'" BeforeTargets="EnsureNodeJSRestored">
     <PropertyGroup>
       <_PackageJson>$(MSBuildProjectDirectory)\package.json</_PackageJson>
     </PropertyGroup>