Upgrades BAP to janestreet v0.16.0 libraries

[bmourad01]

Related: #1589

This is here as a placeholder for now in case we want to upgrade to v0.16.0 version of base, core, core_kernel, and other related libraries.

Several interfaces have been changed/broken as far as I can see, namely:

• X.Set, X.Map, and X.Table have been gutted of various functions that are present in Set, Map, and Hashtbl, respectively
• The Skip and Yield constructors for Sequence.Step.t each expect an inline record for their arguments.
• Binable.Of_binable, Binable.Of_stringable, and Bin_prot.Make_binable are gone and now have {with,without}_uuid and other variants. The without_uuid is marked as "legacy" in the compiler warnings, stating that with_uuid is preferred. I'm leaving it as the former for now as it doesn't require us to change anything else for these functor applications.
• Caml is now deprecated in favor of Stdlib

Right now some of the PowerPC unit tests are failing on my end, so I will try to investigate later when I have time (actually, it seems that they are failing without this change. I'm not sure if this is due to a change in newer versions of LLVM or something else). See #1603, can be merged independently.

[bmourad01]

@ivg pinging just to make you aware of this