[Build]Unify PCH usage (#31055)

* Unify PCH usage

* Add back CIBuild property

* Add back CIBuild property

installer/PowerToysSetupCustomActions/CustomAction.cpp

@@ -1,4 +1,4 @@
-#include "stdafx.h"
+#include "pch.h"
 #include "resource.h"
 #include "RcResource.h"
 #include <ProjectTelemetry.h>

installer/PowerToysSetupCustomActions/PowerToysSetupCustomActions.vcxproj

@@ -130,16 +130,10 @@
       <UACExecutionLevel>HighestAvailable</UACExecutionLevel>
     </Link>
   </ItemDefinitionGroup>
-  <ItemDefinitionGroup Condition="'$(CIBuild)'!='true'">
-    <ClCompile>
-      <PrecompiledHeader>Use</PrecompiledHeader>
-      <PrecompiledHeaderFile>stdafx.h</PrecompiledHeaderFile>
-    </ClCompile>
-  </ItemDefinitionGroup>
   <ItemGroup>
     <ClCompile Include="CustomAction.cpp" />
-    <ClCompile Include="stdafx.cpp">
-      <PrecompiledHeader Condition="'$(CIBuild)'!='true'">Create</PrecompiledHeader>
+    <ClCompile Include="pch.cpp">
+      <PrecompiledHeader Condition="'$(UsePrecompiledHeaders)' != 'false'">Create</PrecompiledHeader>
     </ClCompile>
   </ItemGroup>
   <ItemGroup>
@@ -150,7 +144,7 @@
     <ClInclude Include="DepsFilesLists.h" />
     <ClInclude Include="RcResource.h" />
     <ClInclude Include="resource.h" />
-    <ClInclude Include="stdafx.h" />
+    <ClInclude Include="pch.h" />
     <ClInclude Include="Telemetry\ProjectTelemetry.h" />
     <ClInclude Include="Telemetry\TraceLoggingDefines.h" />
   </ItemGroup>

installer/PowerToysSetupCustomActions/PowerToysSetupCustomActions.vcxproj.filters

@@ -2,10 +2,10 @@
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
     <ClCompile Include="CustomAction.cpp" />
-    <ClCompile Include="stdafx.cpp" />
+    <ClCompile Include="pch.cpp" />
   </ItemGroup>
   <ItemGroup>
-    <ClInclude Include="stdafx.h" />
+    <ClInclude Include="pch.h" />
     <ClInclude Include="Telemetry\ProjectTelemetry.h">
       <Filter>Telemetry</Filter>
     </ClInclude>

installer/PowerToysSetupCustomActions/pch.cpp

@@ -0,0 +1,5 @@
+// pch.cpp: source file corresponding to the pre-compiled header
+
+#include "pch.h"
+
+// When you are using pre-compiled headers, this source file is necessary for compilation to succeed.

installer/PowerToysSetupCustomActions/stdafx.cpp

@@ -1,4 +0,0 @@
-#include "stdafx.h"
-
-// TODO: reference any additional headers you need in STDAFX.H
-// and not in this file