Upgrades BAP to janestreet v0.16 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. It is desirable to keep the version of janestreet libraries (such as base, core, and core_kernel) as current as possible.

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

[ivg]

I went through all the changes, they look pretty syntactical. I wonder what could get wrong that ppc tests fail.

[XVilka]

@bmourad01 do you plan to update/finish the PR?

[bmourad01]

@bmourad01 do you plan to update/finish the PR?

I believe it should be ready now. I put extra constraints on the versions of the libraries (we don't want to allow v0.17 out of the gate, as it will exclude OCaml 4).

Later in the future we can have more discussion about what needs to be done to move BAP to be ready for OCaml 5 (but it seems that this would mean abandoning support for OCaml 4).

[ivg]

Later in the future we can have more discussion about what needs to be done to move BAP to be ready for OCaml 5 (but it seems that this would mean abandoning support for OCaml 4

I wouldn't mind this, if we can jump forward to OCaml 5 and forfeit any support for OCaml 4.x.