Use WorkerCancel.with_no_cancellations throughout module_heaps.ml
Use WorkerCancel.with_no_cancellations throughout module_heaps.ml

Summary: Similar in spirit to D24145621

Reviewed By: samwgoldman

Differential Revision: D24168846

fbshipit-source-id: a3d3c863c754d8966c798d4634d3c8a2c8d4d872

nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow