Reduce number of hypothesis tests in CI (#43591)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/43591
100 randomized inputs vs 50 doesn't change the balance that much but speed up test runtime
Test Plan: CI
Reviewed By: orionr, seemethere
Differential Revision: D23332393
fbshipit-source-id: 7a8ff9127ee3e045a83658a7a670a844f3862987
