LYN-4327 [SDK] External Gem's aren't added to the project solution when using SDK (#1191)

* should pickup the external directories registered by the project

* Add support for AzTest and AzTestRunner in the SDK

* missing IMPORT_LIB

* Moved where .Assets targets get generated so they are visible in the SDK

* generate the Directory.Build.props in the right path

* excluding target on platforms that dont support it

Code/Tools/AzTestRunner/CMakeLists.txt

@@ -9,12 +9,12 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 #
 
-if(PAL_TRAIT_BUILD_TESTS_SUPPORTED)
+ly_get_list_relative_pal_filename(pal_dir ${CMAKE_CURRENT_LIST_DIR}/Platform/${PAL_PLATFORM_NAME})
 
-    ly_get_list_relative_pal_filename(pal_dir ${CMAKE_CURRENT_LIST_DIR}/Platform/${PAL_PLATFORM_NAME})
-
-    include(${pal_dir}/platform_traits_${PAL_PLATFORM_NAME_LOWERCASE}.cmake)
+include(${pal_dir}/platform_traits_${PAL_PLATFORM_NAME_LOWERCASE}.cmake)
 
+if(PAL_TRAIT_AZTESTRUNNER_SUPPORTED)
+    
     ly_add_target(
         NAME AzTestRunner ${PAL_TRAIT_AZTESTRUNNER_LAUNCHER_TYPE}
         NAMESPACE AZ
@@ -32,19 +32,23 @@ if(PAL_TRAIT_BUILD_TESTS_SUPPORTED)
                 AZ::AzTest
                 AZ::AzFramework
     )
+    
+    if(PAL_TRAIT_BUILD_TESTS_SUPPORTED)
+    
+        ly_add_target(
+            NAME AzTestRunner.Tests ${PAL_TRAIT_TEST_TARGET_TYPE}
+            NAMESPACE AZ
+            FILES_CMAKE
+                aztestrunner_test_files.cmake
+            BUILD_DEPENDENCIES
+                PRIVATE
+                    AZ::AzTest
+        )
 
-    ly_add_target(
-        NAME AzTestRunner.Tests ${PAL_TRAIT_TEST_TARGET_TYPE}
-        NAMESPACE AZ
-        FILES_CMAKE
-            aztestrunner_test_files.cmake
-        BUILD_DEPENDENCIES
-            PRIVATE
-                AZ::AzTest
-    )
+        ly_add_googletest(
+            NAME AZ::AzTestRunner.Tests
+        )
 
-    ly_add_googletest(
-        NAME AZ::AzTestRunner.Tests
-    )
+    endif()
 
 endif()

Code/Tools/AzTestRunner/Platform/Android/platform_traits_android.cmake

@@ -9,5 +9,5 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 #
 
+set(PAL_TRAIT_AZTESTRUNNER_SUPPORTED TRUE)
 set(PAL_TRAIT_AZTESTRUNNER_LAUNCHER_TYPE MODULE)
-

Code/Tools/AzTestRunner/Platform/Linux/platform_traits_linux.cmake

@@ -9,5 +9,5 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 #
 
+set(PAL_TRAIT_AZTESTRUNNER_SUPPORTED TRUE)
 set(PAL_TRAIT_AZTESTRUNNER_LAUNCHER_TYPE EXECUTABLE)
-

Code/Tools/AzTestRunner/Platform/Mac/platform_traits_mac.cmake

@@ -9,5 +9,5 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 #
 
+set(PAL_TRAIT_AZTESTRUNNER_SUPPORTED TRUE)
 set(PAL_TRAIT_AZTESTRUNNER_LAUNCHER_TYPE EXECUTABLE)
-

Code/Tools/AzTestRunner/Platform/Windows/platform_traits_windows.cmake

@@ -9,5 +9,5 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 #
 
+set(PAL_TRAIT_AZTESTRUNNER_SUPPORTED TRUE)
 set(PAL_TRAIT_AZTESTRUNNER_LAUNCHER_TYPE EXECUTABLE)
-

Code/Tools/AzTestRunner/Platform/iOS/platform_traits_ios.cmake

@@ -9,5 +9,5 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 #
 
+set(PAL_TRAIT_AZTESTRUNNER_SUPPORTED TRUE)
 set(PAL_TRAIT_AZTESTRUNNER_LAUNCHER_TYPE EXECUTABLE)
-