[L0 v2] implement support for bindless images

Split the legacy implementation into image.cpp (shared with v2)
and image_enqueue.cpp (which contains logic specific to the
legacy adapter).

Also, change the type used to represent the image to be
ur_exp_bindless_image_t, instead of using _ur_image.

source/adapters/level_zero/CMakeLists.txt

@@ -27,7 +27,7 @@ if(UR_BUILD_ADAPTER_L0)
         ${CMAKE_CURRENT_SOURCE_DIR}/program.hpp
         ${CMAKE_CURRENT_SOURCE_DIR}/queue.hpp
         ${CMAKE_CURRENT_SOURCE_DIR}/sampler.hpp
-        ${CMAKE_CURRENT_SOURCE_DIR}/helpers/image_helpers.hpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/image.hpp
         ${CMAKE_CURRENT_SOURCE_DIR}/helpers/kernel_helpers.hpp
         ${CMAKE_CURRENT_SOURCE_DIR}/helpers/memory_helpers.hpp
         ${CMAKE_CURRENT_SOURCE_DIR}/ur_level_zero.cpp
@@ -48,7 +48,7 @@ if(UR_BUILD_ADAPTER_L0)
         ${CMAKE_CURRENT_SOURCE_DIR}/sampler.cpp
         ${CMAKE_CURRENT_SOURCE_DIR}/tensor_map.cpp
         ${CMAKE_CURRENT_SOURCE_DIR}/image.cpp
-        ${CMAKE_CURRENT_SOURCE_DIR}/helpers/image_helpers.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/image_enqueue.cpp
         ${CMAKE_CURRENT_SOURCE_DIR}/helpers/kernel_helpers.cpp
         ${CMAKE_CURRENT_SOURCE_DIR}/helpers/memory_helpers.cpp
         ${CMAKE_CURRENT_SOURCE_DIR}/../../ur/ur.cpp
@@ -131,7 +131,7 @@ if(UR_BUILD_ADAPTER_L0_V2)
         ${CMAKE_CURRENT_SOURCE_DIR}/platform.hpp
         ${CMAKE_CURRENT_SOURCE_DIR}/physical_mem.hpp
         ${CMAKE_CURRENT_SOURCE_DIR}/program.hpp
-        ${CMAKE_CURRENT_SOURCE_DIR}/helpers/image_helpers.hpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/image.hpp
         ${CMAKE_CURRENT_SOURCE_DIR}/helpers/kernel_helpers.hpp
         ${CMAKE_CURRENT_SOURCE_DIR}/helpers/memory_helpers.hpp
         ${CMAKE_CURRENT_SOURCE_DIR}/adapter.cpp
@@ -141,7 +141,7 @@ if(UR_BUILD_ADAPTER_L0_V2)
         ${CMAKE_CURRENT_SOURCE_DIR}/platform.cpp
         ${CMAKE_CURRENT_SOURCE_DIR}/physical_mem.cpp
         ${CMAKE_CURRENT_SOURCE_DIR}/program.cpp
-        ${CMAKE_CURRENT_SOURCE_DIR}/helpers/image_helpers.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/image.cpp
         ${CMAKE_CURRENT_SOURCE_DIR}/helpers/kernel_helpers.cpp
         ${CMAKE_CURRENT_SOURCE_DIR}/helpers/memory_helpers.cpp
         ${CMAKE_CURRENT_SOURCE_DIR}/usm_p2p.cpp