Inline hash_table::calculate_offsets, used by iterators.
Inline hash_table::calculate_offsets, used by iterators.

The `HashMap` and `HashSet` iterators use `RawTable::first_bucket_raw` which is generic and will get inlined cross-crate.
However, `first_bucket_raw` calls `calculate_offsets` and the call doesn't get inlined, despite being a simple function.
This missing `#[inline]` results in `hash_table::calculate_offsets` showing up at the top of a callgrind profile with 3 million calls (for the testcase in #25916).
krzysz00/rust,vhbit/rust,KokaKiwi/rust,aneeshusa/rust,pelmers/rust,vhbit/rust,graydon/rust,dwillmer/rust,seanrivera/rust,jashank/rust,graydon/rust,jroesch/rust,aepsil0n/rust,nwin/rust,zubron/rust,aneeshusa/rust,zachwick/rust,pshc/rust,jroesch/rust,krzysz00/rust,mvdnes/rust,aidancully/rust,krzysz00/rust,graydon/rust,zubron/rust,zubron/rust,pelmers/rust,reem/rust,TheNeikos/rust,aidancully/rust,robertg/rust,mihneadb/rust,sae-bom/rust,seanrivera/rust,l0kod/rust,KokaKiwi/rust,nwin/rust,mvdnes/rust,pshc/rust,TheNeikos/rust,zachwick/rust,omasanori/rust,reem/rust,l0kod/rust,aidancully/rust,aepsil0n/rust,mihneadb/rust,sae-bom/rust,jroesch/rust,TheNeikos/rust,jashank/rust,dwillmer/rust,KokaKiwi/rust,KokaKiwi/rust,krzysz00/rust,pshc/rust,zubron/rust,dwillmer/rust,aneeshusa/rust,l0kod/rust,vhbit/rust,l0kod/rust,mvdnes/rust,mihneadb/rust,zachwick/rust,robertg/rust,TheNeikos/rust,jashank/rust,aidancully/rust,aneeshusa/rust,zubron/rust,TheNeikos/rust,jroesch/rust,mihneadb/rust,dwillmer/rust,seanrivera/rust,mvdnes/rust,pelmers/rust,reem/rust,robertg/rust,GBGamer/rust,dwillmer/rust,GBGamer/rust,krzysz00/rust,zachwick/rust,seanrivera/rust,nwin/rust,seanrivera/rust,sae-bom/rust,jashank/rust,jashank/rust,omasanori/rust,l0kod/rust,nwin/rust,dwillmer/rust,KokaKiwi/rust,l0kod/rust,jashank/rust,sae-bom/rust,vhbit/rust,jashank/rust,jroesch/rust,GBGamer/rust,zachwick/rust,zachwick/rust,jroesch/rust,pelmers/rust,vhbit/rust,jroesch/rust,reem/rust,robertg/rust,vhbit/rust,dwillmer/rust,omasanori/rust,mvdnes/rust,jroesch/rust,l0kod/rust,zubron/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,zubron/rust,aepsil0n/rust,nwin/rust,l0kod/rust,omasanori/rust,aneeshusa/rust,KokaKiwi/rust,graydon/rust,krzysz00/rust,robertg/rust,aepsil0n/rust,jashank/rust,reem/rust,sae-bom/rust,graydon/rust,graydon/rust,mvdnes/rust,omasanori/rust,pshc/rust,reem/rust,nwin/rust,TheNeikos/rust,pelmers/rust,pshc/rust,nwin/rust,pshc/rust,robertg/rust,aneeshusa/rust,sae-bom/rust,dwillmer/rust,omasanori/rust,nwin/rust,GBGamer/rust,vhbit/rust,mihneadb/rust,vhbit/rust,GBGamer/rust,aepsil0n/rust,aepsil0n/rust,mihneadb/rust,aidancully/rust,pelmers/rust,pshc/rust,pshc/rust,seanrivera/rust,zubron/rust