build: hack around unnecessary docker image pulls on circleci
build: hack around unnecessary docker image pulls on circleci

Fixes #5849.

sunya123/cockroach,paperstreet/cockroach,glycerine/cockroach,petermattis/cockroach,cockroachdb/cockroach,petermattis/cockroach,bg451/cockroach,vaibhavarora/cockroach,cockroachdb/cockroach,paperstreet/cockroach,paperstreet/cockroach,sunya123/cockroach,paperstreet/cockroach,vivekmenezes/cockroach,vaibhavarora/cockroach,vivekmenezes/cockroach,maxlang/cockroach,petermattis/cockroach,cockroachdb/cockroach,arjun4084346/cockroach,vaibhavarora/cockroach,veteranlu/cockroach,petermattis/cockroach,glycerine/cockroach,bg451/cockroach,veteranlu/cockroach,glycerine/cockroach,vaibhavarora/cockroach,arjun4084346/cockroach,glycerine/cockroach,maxlang/cockroach,veteranlu/cockroach,maxlang/cockroach,vivekmenezes/cockroach,paperstreet/cockroach,veteranlu/cockroach,vaibhavarora/cockroach,maxlang/cockroach,veteranlu/cockroach,arjun4084346/cockroach,petermattis/cockroach,paperstreet/cockroach,vivekmenezes/cockroach,glycerine/cockroach,vivekmenezes/cockroach,sunya123/cockroach,vivekmenezes/cockroach,cockroachdb/cockroach,arjun4084346/cockroach,bg451/cockroach,bg451/cockroach,vivekmenezes/cockroach,maxlang/cockroach,veteranlu/cockroach,maxlang/cockroach,vaibhavarora/cockroach,petermattis/cockroach,arjun4084346/cockroach,arjun4084346/cockroach,bg451/cockroach,maxlang/cockroach,vaibhavarora/cockroach,veteranlu/cockroach,petermattis/cockroach,bg451/cockroach,sunya123/cockroach,vaibhavarora/cockroach,sunya123/cockroach,paperstreet/cockroach,cockroachdb/cockroach,petermattis/cockroach,cockroachdb/cockroach,sunya123/cockroach,glycerine/cockroach,cockroachdb/cockroach,sunya123/cockroach,glycerine/cockroach,paperstreet/cockroach,veteranlu/cockroach,maxlang/cockroach,arjun4084346/cockroach,arjun4084346/cockroach,cockroachdb/cockroach,glycerine/cockroach,vivekmenezes/cockroach,bg451/cockroach,sunya123/cockroach