[Intrinsics] Add `nocallback` to the default intrinsic attributes

Most intrinsics, especially "default" ones, will not call back into the
IR module. `nocallback` encodes this nicely. As it was not used before,
this patch also makes use of `nocallback` in the Attributor which
results in many more `norecurse` deductions.

Tablegen part is mechanical, test updates by script.

Differential Revision: https://reviews.llvm.org/D118680