Better python resolution (pytorch#16389)

### Summary
used find_package to resolve python

Author: TareHimself

tools/cmake/Utils.cmake

@@ -69,28 +69,11 @@ function(target_link_options_gc_sections target_name)
   endif()
 endfunction()
 
-# Sets the value of the PYTHON_EXECUTABLE variable to 'python' if in an active
-# (non-base) conda environment, and 'python3' otherwise. This maintains
-# backwards compatibility for non-conda users and avoids conda users needing to
-# explicitly set PYTHON_EXECUTABLE=python.
 function(resolve_python_executable)
-  # Counter-intuitively, CONDA_DEFAULT_ENV contains the name of the active
-  # environment.
-  if(DEFINED ENV{CONDA_DEFAULT_ENV} AND NOT $ENV{CONDA_DEFAULT_ENV} STREQUAL
-                                        "base"
-  )
-    set(PYTHON_EXECUTABLE
-        python
-        PARENT_SCOPE
-    )
-  elseif(DEFINED ENV{VIRTUAL_ENV})
-    set(PYTHON_EXECUTABLE
-        $ENV{VIRTUAL_ENV}/bin/python3
-        PARENT_SCOPE
-    )
-  else()
+  if(NOT PYTHON_EXECUTABLE)
+    find_package(Python3 REQUIRED COMPONENTS Interpreter)
     set(PYTHON_EXECUTABLE
-        python3
+        ${Python3_EXECUTABLE}
         PARENT_SCOPE
     )
   endif()