[fbsync] Refactor tests for ops (#6027)

Summary:
* Refactor tests

* Remove tol, fix comments

* Add tolerance only where necessary

* Add tolerance only where necessary

* Add tolerance only where necessary

* Refactor to adapt suggestions

* Refactor and add nits

* Refactor box area

* Refactor to one file

* Adapt almost all except area

* final update

* Tighten for jit

* Refactor slightly

* Fix tests

Reviewed By: NicolasHug

Differential Revision: D38351754

fbshipit-source-id: 31a7cc6b21a875bab52d5377c52c22c387407206

Co-authored-by: Vasilis Vryniotis <[email protected]>

Author: datumbox