* stage2: add @TypeOf

* stage2: discriminate on what type of @builtinCall in nodeMayNeedMemoryLocation

* merge upstream into my stash

* add type equality to make easier to test and defer free the types

* remove addDeclErr, I dont know why I added it, its from a different branch that im working on

* add tests

* update error message to match stage1

* use ComptimeStringMap and update which nodes don't need memory from vexu's suggestions

* fix typo

Co-authored-by: Veikka Tuominen <git@vexu.eu>

* make @TypeOf(single_arg) go to .typeof zir inst and add test for that

* unioninit, as, reduce change mayneedmemorylocation

Co-authored-by: Veikka Tuominen <git@vexu.eu>