Rollup merge of #62229 - christianpoveda:intptrcast-explicit-casts, r=RalfJung
Rollup merge of #62229 - christianpoveda:intptrcast-explicit-casts, r=RalfJung

Enable intptrcast for explicit casts

I checked locally that this does not break miri on master. r? @RalfJung

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