Added support for more integer sizes

This is mostly in service of implementing TagRef64, which can
now be initialized by a bundle (but is as of yet not properly
implemented).
Status Job ID Name Coverage
  Build
canceled #5889
build_test

canceled #5888
build_vm

 
  Test
canceled #5890
test:cargo:api

canceled #5892
test:cargo:compiler

canceled #5891
test:cargo:ir

canceled #5893
test:cargo:runtime

canceled #5895
testjit:binops

canceled #5896
testjit:cmpops

canceled #5897
testjit:controlflow

canceled #5898
testjit:convops

canceled #5899
testjit:double

canceled #5900
testjit:memops

canceled #5894
testjit:milestones

canceled #5901
testjit:otherops

canceled #5902
testjit:rpython

canceled #5903
testjit:som