default caffe2_tvm_min_ops to 10 (#28250)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/28250
We've been running canaries with this setting for a while
Test Plan: build, sanity canary
Reviewed By: yinghai
Differential Revision: D17872108
fbshipit-source-id: fb7f0373eac1c8aaae007a17f6ffb91482952813
