Allow fusion of float function arguments (#18087)

Allow fusion of float function arguments (#18087)

Summary:
so that functions like `def fn(x, p:float)` can be fused. Fixes #9940 and #11186. Fuses only float (not integer) arguments to simplify assembling arguments for fusion launch.
CPU fusion is disabled in CI and this won't be tested, but I tested it locally.
cc t-vi, apaszke
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18087

Differential Revision: D14581206

Pulled By: wanchaol

fbshipit-source-id: ccb0cf79b1751706f9b2cdf1715115eae5a39fb6