Clear input/ouput shape cache for each inference (#19085)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/19085
This is a bug where input_shapes_ and output_shapes_ will grow indefinitely. Fix it here.
Reviewed By: bertmaher, rdzhabarov
Differential Revision: D14861695
fbshipit-source-id: d59116f27c3b54f5cc5a33533de4b9222dbb7afc
