DOC: Add release notes for ctypes improvements
DOC: Add release notes for ctypes improvements

Fixes gh-12272

simongibbons/numpy,numpy/numpy,WarrenWeckesser/numpy,mhvk/numpy,grlee77/numpy,rgommers/numpy,WarrenWeckesser/numpy,pbrod/numpy,WarrenWeckesser/numpy,madphysicist/numpy,shoyer/numpy,shoyer/numpy,shoyer/numpy,grlee77/numpy,jorisvandenbossche/numpy,anntzer/numpy,simongibbons/numpy,shoyer/numpy,jakirkham/numpy,jakirkham/numpy,pbrod/numpy,seberg/numpy,simongibbons/numpy,pizzathief/numpy,endolith/numpy,pdebuyl/numpy,charris/numpy,WarrenWeckesser/numpy,charris/numpy,charris/numpy,MSeifert04/numpy,ahaldane/numpy,MSeifert04/numpy,mhvk/numpy,numpy/numpy,ahaldane/numpy,mattip/numpy,pdebuyl/numpy,pbrod/numpy,pizzathief/numpy,mattip/numpy,madphysicist/numpy,WarrenWeckesser/numpy,pbrod/numpy,ahaldane/numpy,shoyer/numpy,MSeifert04/numpy,mattip/numpy,anntzer/numpy,pizzathief/numpy,mhvk/numpy,abalkin/numpy,pdebuyl/numpy,jakirkham/numpy,endolith/numpy,endolith/numpy,simongibbons/numpy,jorisvandenbossche/numpy,ahaldane/numpy,charris/numpy,anntzer/numpy,abalkin/numpy,anntzer/numpy,numpy/numpy,jakirkham/numpy,pizzathief/numpy,rgommers/numpy,grlee77/numpy,seberg/numpy,seberg/numpy,grlee77/numpy,endolith/numpy,rgommers/numpy,MSeifert04/numpy,pbrod/numpy,rgommers/numpy,mhvk/numpy,numpy/numpy,MSeifert04/numpy,jorisvandenbossche/numpy,madphysicist/numpy,simongibbons/numpy,pdebuyl/numpy,jorisvandenbossche/numpy,madphysicist/numpy,pizzathief/numpy,mhvk/numpy,jakirkham/numpy,abalkin/numpy,jorisvandenbossche/numpy,seberg/numpy,ahaldane/numpy,grlee77/numpy,madphysicist/numpy,mattip/numpy