julia

bbb4403f - refactor mallocarray_t to reflect it should carry jl_genericmemory_t (#55237)

refactor mallocarray_t to reflect it should carry jl_genericmemory_t (#55237) Seems like this `mallocarray_t` container is only carrying objects of type `jl_genericmemory_t` after the memory work. Let's: * Rename the container type to `mallocmemory_t`. * Make the payload type a bit more strict to ensure a bit more type safety (i.e. change the `a` field from `jl_value_t *` to `jl_genericmemory_t *`). * Add a comment to indicate the pointer tagging in the lowest bit of the payload.