Fix installation with aotriton

Upstream bug: https://github.com/pytorch/pytorch/issues/158109
--- a/cmake/External/aotriton.cmake
+++ b/cmake/External/aotriton.cmake
@@ -56,7 +56,8 @@ if(NOT __AOTRITON_INCLUDED)
   set(__AOTRITON_Z "gz")
   # Set the default __AOTRITON_LIB path
   if(NOT WIN32)
-    set(__AOTRITON_LIB "lib/libaotriton_v2.so")
+    include(GNUInstallDirs)
+    set(__AOTRITON_LIB "${CMAKE_INSTALL_LIBDIR}/libaotriton_v2.so")
   else()
     set(__AOTRITON_LIB "lib/aotriton_v2.lib")
   endif()
@@ -240,10 +241,6 @@ if(NOT __AOTRITON_INCLUDED)
 
   # Note it is INSTALL"ED"
   if(DEFINED ENV{AOTRITON_INSTALLED_PREFIX})
-    install(DIRECTORY
-            $ENV{AOTRITON_INSTALLED_PREFIX}/lib
-            $ENV{AOTRITON_INSTALLED_PREFIX}/include
-            DESTINATION ${__AOTRITON_INSTALL_DIR})
     set(__AOTRITON_INSTALL_DIR "$ENV{AOTRITON_INSTALLED_PREFIX}")
     message(STATUS "Using Preinstalled AOTriton at ${__AOTRITON_INSTALL_DIR}")
   elseif(DEFINED ENV{AOTRITON_INSTALL_FROM_SOURCE})
@@ -280,19 +277,4 @@ if(NOT __AOTRITON_INCLUDED)
   target_link_libraries(__caffe2_aotriton INTERFACE "${__AOTRITON_INSTALL_DIR}/${__AOTRITON_LIB}")
   target_include_directories(__caffe2_aotriton INTERFACE ${__AOTRITON_INSTALL_DIR}/include)
   set(AOTRITON_FOUND TRUE)
-  # Install libaotriton_v2.so into the cmake install tree so it ends up in
-  # site-packages/torch/lib/ when building with scikit-build-core.
-  # aotriton's ExternalProject puts the library directly in the source tree
-  # (${PROJECT_SOURCE_DIR}/torch/lib/) without a cmake install() rule, so it
-  # is absent from the installed wheel and causes link failures in downstream
-  # cmake builds (e.g., custom op builds) that link against installed torch.
-  install(DIRECTORY "${__AOTRITON_INSTALL_DIR}/lib/"
-    DESTINATION "lib"
-    FILES_MATCHING PATTERN "libaotriton_v2*.so*"
-  )
-  # Install aotriton GPU kernel images (compressed ISA blobs) into the wheel.
-  install(DIRECTORY "${__AOTRITON_INSTALL_DIR}/lib/aotriton.images"
-    DESTINATION "lib"
-    OPTIONAL
-  )
 endif() # __AOTRITON_INCLUDED