[PyTorchEdge] Move all serialize/deserialize files to a separate target (#66805)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/66805
{F672465642}
DGW:
```
buck query 'allpaths(//xplat/caffe2:torch_mobile_core, //xplat/caffe2:torch_mobile_interpreter)' --output-format dot_compact | pastry
bunnylol dgw paste_id
```
Test Plan:
buck builds to pass
```
buck build fbsource//fbandroid/mode/opt @//fbandroid/mode/messenger //fbandroid/apps/messenger:messenger_staticdi_dextr_splitarsc_dlstr_xzs_for_perftest_redex_optimizedtestableresources_postprocessed_resign //fbandroid/apps/messenger:messenger_staticdi_dextr_splitarsc_dlstr_xzs_for_perftest#unstripped_native_libraries
buck build //xplat/caffe2:torch_mobile_coreAndroid#android-armv7,shared
buck build //xplat/caffe2:torch_commonAndroid#android-armv7,shared
```
DGW:
```
buck query 'allpaths(//xplat/caffe2/fb/runtime:only_flatbuffer_test, //xplat/caffe2:miniz)' --output-format dot_compact | pastry
P464671429: https://www.internalfb.com/intern/paste/P464671429/
bunnylol dgw P464671429
```
loader is decoupled from miniz
```
buck query 'allpaths(//xplat/caffe2/fb/runtime:flatbuffer_loader, //xplat/caffe2:miniz)' --output-format dot_compactdigraph result_graph {
}
```
Reviewed By: iseeyuan
Differential Revision: D31532862
fbshipit-source-id: 51e6880e78e1cafe20c8d90e98037edc3c1b6b11
