Cleaning et_schema of InferenceRun for OSS (#565)

Summary:
Pull Request resolved: #565

These are concepts that aren't useful in the OSS world. Associated tests were also moved

- Moved out InferenceRun, OperatorGraphWithStats, ExportedETOperatorGraph for internal
- Changed FXOperatorGraph to extending OperatorGraph instead of OperatorGraphWithStats
- Tests for EDIR (to be renamed) moved to internal since they are heavily coupled with InferenceRun

Reviewed By: tarun292

Differential Revision: D49839120

fbshipit-source-id: f20ba1f88f8461125b3bfd3f487c8f91d8169d7e

Author: Jack-Khuu

sdk/edir/TARGETS

@@ -17,13 +17,8 @@ python_library(
         "et_schema.py",
     ],
     deps = [
-        "fbsource//third-party/pypi/numpy:numpy",
         ":base_schema",
         "//caffe2:torch",
         "//executorch/exir:lib",
-        "//executorch/exir:schema",
-        "//executorch/exir/_serialize:lib",
-        "//executorch/sdk/etdump:schema",
-        "//executorch/sdk/etdump:serialize",
     ],
 )