Fix some style details in generation

[AThousandShips]

Some minor output fixes that I came across while fixing some other bugs, this would generate things like:

static Object  *instance_from_id(int64_t instance_id);
Object * get_object() const;
virtual Error _get_packet(const uint8_t * *r_buffer, int32_t *r_buffer_size);

These are all now fixed

[dsnopek]

Thanks!

In my testing this fixes some of the style issues from the description, but creates some new ones.

For example, with MultiplayerPeerExtensnion::_get_packet(), it fixes the const uint8_t * *r_buffer turning it into const uint8_t **r_buffer, but it messes up the next argument, turning it from int32_t *r_buffer_size into int32_t*r_buffer_size (with no spaces at all).

I diff'd the generated code between master and this PR (rebased on master), and skimming through it, it's possible this one "pattern" is the only new issue created.

Here's the diff I generated, in case it's helpful: godot-cpp-pr-1423-diff.txt

[AThousandShips]

Thank you, will look at those cases, should be straightforward