Enable C2 load rate limiter [2/n] (#61551)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/61551
We aim to enable rate limiter in C2 load, with a fix bandwidth limit.
This diff update LoadOp to pass down the manifold db options.
Test Plan:
```
buck test mode/opt caffe2/caffe2/python/operator_test:load_save_test
```
Differential Revision: D29639102
fbshipit-source-id: cf69549adadf4c7f12a8a2b7f3ca39092cab4b99
