Remove Array include from dictionary.h and ustring.h.

[Ivorforce]

• Follow-up of Add STATIC_ASSERT_INCOMPLETE_TYPE to enforce include minimality. #107587

Decreases coupling within core by removing array.h include from dictionary.h and ustring.h.
Most modules will include it anyway, since many are working with variant.h, which includes pretty much everything.

Still, this should improve compile time for some modules, and pave the way for the eventual variant.h includes refactor.

[Repiteo]

Looks good!

[Repiteo]

While testing a merge batch, other changes revealed further necessary forward-declares. The first is that we need to forward-declare Array in core/extension/gdextension_special_compat_hashes.h, while the second is shown below (alongside respecting the original file's choice to separate class/struct fds with a newline)

[Ivorforce]

While testing a merge batch, other changes revealed further necessary forward-declares. The first is that we need to forward-declare Array in core/extension/gdextension_special_compat_hashes.h, while the second is shown below (alongside respecting the original file's choice to separate class/struct fds with a newline)

I had a feeling some of these include changes would clash 😅
Thanks for the pointers, I've pushed a version that builds again!

[Repiteo]

I had a feeling some of these include changes would clash 😅

Yeaaah, that's another inconvenience of this process. Piecemealed changes are great for atomic changelogs, but they won't always play nice if merged in batches. Attempting to not merge in batches can lead to this process taking too long, and risks stagnating several PRs that are completely acceptable in isolation.

I suppose there's always the option of a local validation step and making relevant changes there before pushing, but I can't guarantee that'll pass all CI as well. If anything, this could be the usecase for the native merge queue feature, albeit one that'd still need a healthy amount of pre-planning

In any case, assuming CI passes, this is once again ready to roll!

[Repiteo]

Thanks!