Rollup merge of #59603 - matklad:ptrhash, r=Centril
Rollup merge of #59603 - matklad:ptrhash, r=Centril

stabilize ptr::hash

closes #56286

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