Terrain depends on SurfaceData and GradientSignal (#5476)

Signed-off-by: Alex Peterson <26804013+AMZN-alexpete@users.noreply.github.com>

Gems/Terrain/Code/CMakeLists.txt

@@ -26,8 +26,6 @@ ly_add_target(
             Gem::GradientSignal
             Gem::SurfaceData
             Gem::LmbrCentral
-            
-            
 )
 
 ly_add_target(
@@ -49,14 +47,14 @@ ly_add_target(
 )
 
 # the above module is for use in all client/server types
-ly_create_alias(NAME Terrain.Servers  NAMESPACE Gem TARGETS Gem::Terrain)
-ly_create_alias(NAME Terrain.Clients  NAMESPACE Gem TARGETS Gem::Terrain)
+ly_create_alias(NAME Terrain.Servers  NAMESPACE Gem TARGETS Gem::Terrain Gem::SurfaceData.Servers Gem::GradientSignal.Servers)
+ly_create_alias(NAME Terrain.Clients  NAMESPACE Gem TARGETS Gem::Terrain Gem::SurfaceData.Clients Gem::GradientSignal.Clients)
 
 # If we are on a host platform, we want to add the host tools targets like the Terrain.Editor target which
 # will also depend on Terrain.Static
 if(PAL_TRAIT_BUILD_HOST_TOOLS)
     ly_add_target(
-        NAME Terrain.Editor MODULE
+        NAME Terrain.Editor GEM_MODULE
         NAMESPACE Gem
         AUTOMOC
         FILES_CMAKE
@@ -78,8 +76,8 @@ if(PAL_TRAIT_BUILD_HOST_TOOLS)
     )
 
     # the above module is for use in dev tool situations
-    ly_create_alias(NAME Terrain.Builders NAMESPACE Gem TARGETS Gem::Terrain.Editor)
-    ly_create_alias(NAME Terrain.Tools    NAMESPACE Gem TARGETS Gem::Terrain.Editor)
+    ly_create_alias(NAME Terrain.Builders NAMESPACE Gem TARGETS Gem::Terrain.Editor Gem::SurfaceData.Builders Gem::GradientSignal.Builders)
+    ly_create_alias(NAME Terrain.Tools    NAMESPACE Gem TARGETS Gem::Terrain.Editor Gem::SurfaceData.Tools Gem::GradientSignal.Tools)
 endif()
 
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