Auto merge of #32396 - nodakai:range-contains, r=alexcrichton
Auto merge of #32396 - nodakai:range-contains, r=alexcrichton

Add core::ops::Range*::contains() as per rust-lang/rust#32311

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