xcode+cmake: Use SDL3.framework/SDL3 as IMPORTED_LOCATION

Not adding /SDL3 causes CMake to no longer set the RUNPATh on
binaries in the build directory.
It also breaks compatibility with CMake versions older then 3.28.

reverts c56a3f60fe (xcode+cmake: use SDL3.framework folder as IMPORTED_LOCATION)
reverts ad3c7b92f8 (xcode+cmake: use SDL3.framework folder as IMPORTED_LOCATION)

Xcode/SDL/pkg-support/resources/cmake/SDL3Config.cmake

@@ -59,7 +59,7 @@ if(NOT TARGET SDL3::SDL3-shared)
     set_target_properties(SDL3::SDL3-shared
         PROPERTIES
             FRAMEWORK "TRUE"
-            IMPORTED_LOCATION "${_sdl3_framework_path}"
+            IMPORTED_LOCATION "${_sdl3_framework_path}/SDL3"
             INTERFACE_LINK_LIBRARIES "SDL3::Headers"
             COMPATIBLE_INTERFACE_BOOL "SDL3_SHARED"
             INTERFACE_SDL3_SHARED "ON"

Xcode/SDL/pkg-support/share/cmake/SDL3/SDL3Config.cmake

@@ -112,7 +112,7 @@ if(NOT TARGET SDL3::SDL3-shared)
         set_target_properties(SDL3::SDL3-shared
             PROPERTIES
                 FRAMEWORK "TRUE"
-                IMPORTED_LOCATION "${_sdl3_framework_path}"
+                IMPORTED_LOCATION "${_sdl3_framework_path}/SDL3"
                 INTERFACE_LINK_LIBRARIES "SDL3::Headers"
         )
     endif()