std: Deprecate the copy_{,mut_}lifetime functions
std: Deprecate the copy_{,mut_}lifetime functions

Unsafe patterns such as `slice::from_raw_parts` and `CStr::from_ptr` have shown
that dealing with lifetimes, while useful, is often a hindrance. Consequently
these functions are rarely called today and are being deprecated.

vhbit/rust,dwillmer/rust,robertg/rust,GBGamer/rust,pelmers/rust,KokaKiwi/rust,reem/rust,mvdnes/rust,graydon/rust,pshc/rust,vhbit/rust,l0kod/rust,jroesch/rust,reem/rust,pelmers/rust,GBGamer/rust,graydon/rust,vhbit/rust,jroesch/rust,graydon/rust,KokaKiwi/rust,nwin/rust,jroesch/rust,reem/rust,mvdnes/rust,l0kod/rust,aidancully/rust,omasanori/rust,omasanori/rust,l0kod/rust,KokaKiwi/rust,pshc/rust,pshc/rust,jroesch/rust,omasanori/rust,nwin/rust,zubron/rust,GBGamer/rust,GBGamer/rust,KokaKiwi/rust,pshc/rust,jashank/rust,l0kod/rust,jroesch/rust,mvdnes/rust,vhbit/rust,aidancully/rust,vhbit/rust,omasanori/rust,mvdnes/rust,mvdnes/rust,pelmers/rust,robertg/rust,dwillmer/rust,zubron/rust,jroesch/rust,l0kod/rust,graydon/rust,omasanori/rust,jashank/rust,nwin/rust,robertg/rust,nwin/rust,jashank/rust,graydon/rust,zubron/rust,pshc/rust,GBGamer/rust,jashank/rust,KokaKiwi/rust,zubron/rust,robertg/rust,l0kod/rust,zubron/rust,zubron/rust,KokaKiwi/rust,nwin/rust,zubron/rust,aidancully/rust,vhbit/rust,jashank/rust,nwin/rust,reem/rust,reem/rust,dwillmer/rust,jashank/rust,aidancully/rust,nwin/rust,graydon/rust,l0kod/rust,GBGamer/rust,mvdnes/rust,robertg/rust,vhbit/rust,GBGamer/rust,dwillmer/rust,pshc/rust,pelmers/rust,robertg/rust,l0kod/rust,zubron/rust,pelmers/rust,jashank/rust,dwillmer/rust,pelmers/rust,GBGamer/rust,omasanori/rust,dwillmer/rust,pshc/rust,jashank/rust,pshc/rust,reem/rust,aidancully/rust,aidancully/rust,dwillmer/rust,jroesch/rust,nwin/rust,dwillmer/rust,vhbit/rust,jroesch/rust