Defer initialisation logging messages

[SamTebbs33]

It would be nice to use Zig's defer when printing at the end of each initialisation function. See @DrDeano 's comment here for context.

[DrDeano]

We will need to make sure to handle the case when runtime tests are active as derfer will be called after the runtime tests. Maybe we could change the python test cases to get around this where we would have the init then runtime tests, then the done.