Some functions to look at UnboundedQueue inlined code
Some functions to look at UnboundedQueue inlined code

Summary: [Folly] Some functions to look at `UnboundedQueue` inlined native code. Doing everything runs into the combinatorial explosion wall, but do USPSC and UMPMC dequeue variants.

Reviewed By: magedm

Differential Revision: D13187510

fbshipit-source-id: 676e00c770682d44a87d0f8d81b050629bc05820

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