Rollup merge of #40909 - nagisa:fix-vec-placement, r=alexcrichton
Rollup merge of #40909 - nagisa:fix-vec-placement, r=alexcrichton

Allow using Vec::<T>::place_back for T: !Clone

The place_back was likely put into block with `T: Clone` bound by mistake.

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