[Executorch][optimized ops] FIx bug in the optimized cpu ops configuration

Previous diff erroneously used portable for optimized dep

Differential Revision: [D54766069](https://our.internmc.facebook.com/intern/diff/D54766069/)

ghstack-source-id: 218209333
Pull Request resolved: #2349

Author: kimishpatel

examples/models/llama2/runner/targets.bzl

@@ -6,7 +6,7 @@ def _get_operator_lib(aten = False):
     elif runtime.is_oss:
         return ["//executorch/kernels/portable:generated_lib"]
     else:
-        return ["//executorch/kernels/portable:generated_lib", "//executorch/examples/models/llama2/custom_ops:custom_ops", "//executorch/examples/models/llama2/ops:generated_lib"]
+        return ["//executorch/configurations:optimized_native_cpu_ops", "//executorch/examples/models/llama2/custom_ops:custom_ops", "//executorch/examples/models/llama2/ops:generated_lib"]
 
 def define_common_targets():
     for aten in (True, False):