Rollup merge of #85177 - tspiteri:wrapping-bits, r=joshtriplett
Rollup merge of #85177 - tspiteri:wrapping-bits, r=joshtriplett

add BITS associated constant to core::num::Wrapping

This keeps `Wrapping` synchronized with the primitives it wraps as for the #32463 `wrapping_int_impl` feature.

graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust