Run place/secondary_use functions also when dig is held down

[Zughy]

Fixes #13581

To do

This PR is Ready for Review.

How to test

1. Snippet in the linked issue (items with on_use)
2. Edit a devtest pickaxe (items without on_use) adding

on_secondary_use = function(itemstack, user, pointed_thing)
    core.chat_send_all("On secondary use")
end,
	   
on_place = function(itemstack, user, pointed_thing)
    core.chat_send_all("On place")
end

3. Right-click around whilst digging (in the air or not), they should now work

[sfan5]

Isn't this a breaking change?
Nevermind. It's certainly a behavior change but if we consider this a bug, then it's alright.