disabling external headers for analyzer

Signed-off-by: Esteban Papp <81431996+amznestebanpapp@users.noreply.github.com>

cmake/Platform/Common/MSVC/Configurations_msvc.cmake

@@ -136,6 +136,7 @@ endif()
 ly_set(LY_CXX_SYSTEM_INCLUDE_CONFIGURATION_FLAG 
     /experimental:external # Turns on "external" headers feature for MSVC compilers
     /external:W0 # Set warning level in external headers to 0. This is used to suppress warnings 3rdParty libraries which uses the "system_includes" option in their json configuration
+    /analyze:external- # disable analysis on external headers
 )
 if(NOT CMAKE_INCLUDE_SYSTEM_FLAG_CXX)
     ly_set(CMAKE_INCLUDE_SYSTEM_FLAG_CXX /external:I)

cmake/Platform/Common/MSVC/Directory.Build.props

@@ -22,6 +22,8 @@ SPDX-License-Identifier: Apache-2.0 OR MIT
                  handles external headers in MSVC, we can remove that code and this
             -->
             <ExternalWarningLevel>TurnOffAllWarnings</ExternalWarningLevel>
+            <!-- We also disable the analysis of external headers. -->
+            <DisableAnalyzeExternal>true</DisableAnalyzeExternal>
         </ClCompile>
     </ItemDefinitionGroup>
     <!-- Continue scanning upwards to pick up all Directory.Build.props -->