[PyTorchEdge] Backport from v9 flatbuffer to v8 pickle (#75201)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/75201
In this diff:
1. Bump supported version to 9, which will serve as a placeholder for upcoming version bump to v9 for flatbuffer format migration.
2. Implements backport from v9 flatbuffer file to v8 pickle file.
ghstack-source-id: 153225189
(Note: this ignores all push blocking failures!)
Test Plan:
fb:
```
cd ~/fbsource/fbcode/ && buck test -c fbcode.caffe2_enable_flatbuffer=1 caffe2/test/cpp/jit:jit -- LiteInterpreterTest.BackPortByteCodeModelAllVersions
Parsing buck files: finished in 0.7 sec
Downloaded 0/25 artifacts, 0.00 bytes, 100.0% cache miss (for updated rules)
Building: finished in 20.7 sec (100%) 21783/21783 jobs, 5/21783 updated
cd ~/fbsource/fbcode/ && buck test caffe2/test/cpp/jit:jit -- FlatbufferTest.FlatbufferBackPortTest
Parsing buck files: finished in 0.7 sec
Building: finished in 4.5 sec (100%) 12972/53298 jobs, 0/53298 updated
Total time: 5.3 sec
More details at https://www.internalfb.com/intern/buck/build/b658d597-d358-4293-97cb-28e7612b96e8
BUILD SUCCEEDED
Tpx test run coordinator for Facebook. See https://fburl.com/tpx for details.
Running with tpx session id: 35d5542d-6ee3-4c28-be10-1d822c7a6fef
Trace available for this run at /tmp/tpx-20220308-090347.891303-35d5542d-6ee3-4c28-be10-1d822c7a6fef/trace.log
RemoteExecution session id: reSessionID-35d5542d-6ee3-4c28-be10-1d822c7a6fef-tpx
Started reporting to test run: https://www.internalfb.com/intern/testinfra/testrun/8444249379196000
✓ ListingSuccess: caffe2/test/cpp/jit:jit : 490 tests discovered (22.838)
✓ Pass: caffe2/test/cpp/jit:jit - FlatbufferTest.FlatbufferBackPortTest (0.289)
Summary
Pass: 1
ListingSuccess: 1
If you need help understanding your runs, please follow the wiki: https://fburl.com/posting_in_tpx_users
Finished test run: https://www.internalfb.com/intern/testinfra/testrun/8444249379196000
```
Reviewed By: iseeyuan
Differential Revision: D34702597
fbshipit-source-id: 5c203c29d13360d7934ce6e57557739e7038c05e
(cherry picked from commit 6189e08a2bd968fdab636f77cb6bd73d6c36beb2)
