Fix the DefaultGem template's Editor target (#3853)

Removes the OUTPUT_NAME from the .Editor target in the Gem template.
Removes the same from Gems that have it currently.

Signed-off-by: amzn-phist <52085794+amzn-phist@users.noreply.github.com>

Gems/LyShine/Code/CMakeLists.txt

@@ -156,7 +156,6 @@ if (PAL_TRAIT_BUILD_HOST_TOOLS)
     ly_add_target(
         NAME LyShine.Builders GEM_MODULE
         NAMESPACE Gem
-        OUTPUT_NAME Gem.LyShine.Builders
         FILES_CMAKE
             lyshine_common_module_files.cmake
         COMPILE_DEFINITIONS

Gems/Terrain/Code/CMakeLists.txt

@@ -55,7 +55,6 @@ if(PAL_TRAIT_BUILD_HOST_TOOLS)
         NAME Terrain.Editor MODULE
         NAMESPACE Gem
         AUTOMOC
-        OUTPUT_NAME Gem.Terrain.Editor
         FILES_CMAKE
             terrain_editor_shared_files.cmake
         COMPILE_DEFINITIONS

Templates/DefaultGem/Template/Code/CMakeLists.txt

@@ -85,7 +85,6 @@ if(PAL_TRAIT_BUILD_HOST_TOOLS)
         NAME ${Name}.Editor GEM_MODULE
         NAMESPACE Gem
         AUTOMOC
-        OUTPUT_NAME Gem.${Name}.Editor
         FILES_CMAKE
             ${NameLower}_editor_shared_files.cmake
         INCLUDE_DIRECTORIES