Unify usage of undo_redo in editor

[KoBeWi]

While making #59564 I noticed that undo usage in the editor is very inconsistent. Some classes use singleton, some have EditorData pointer, but most classes have "cached" UndoRedo pointer (now EditorUndoRedoManager), which is often set with set_undo_redo(). The thing is, it's always initialized with the singleton UndoRedo XD. And only leads to useless forward-declares and useless calls that pass global object lol

This PR is supposed clean that up. It removes all references to EditorUndoRedoManager in header files. Now the undo usage is

Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
undo_redo->do_stuff()

consistently. I also fixed some code that didn't use the undoredo as reference. The cleanup is not complete though. There are many changes, so I'm going to split it into multiple PRs.

[akien-mga]

2022-11-02T15:35:46.7978909Z tile_set_editor.cpp
2022-11-02T15:35:50.1909492Z scons: *** [editor\plugins\tiles\tile_set_atlas_source_editor.windows.editor.x86_64.obj] Error 2
2022-11-02T15:35:50.1910138Z editor\plugins\tiles\tile_set_atlas_source_editor.cpp(1315): error C2220: the following warning is treated as an error
2022-11-02T15:35:52.0761081Z editor\plugins\tiles\tile_set_atlas_source_editor.cpp(1315): warning C4458: declaration of 'undo_redo' hides class member
2022-11-02T15:35:52.0762128Z D:\a\godot\godot\editor\plugins\tiles\tile_set_atlas_source_editor.h(117): note: see declaration of 'TileSetAtlasSourceEditor::undo_redo'
2022-11-02T15:35:52.0762837Z editor\plugins\tiles\tile_set_atlas_source_editor.cpp(1551): warning C4458: declaration of 'undo_redo' hides class member
2022-11-02T15:35:52.0763634Z D:\a\godot\godot\editor\plugins\tiles\tile_set_atlas_source_editor.h(117): note: see declaration of 'TileSetAtlasSourceEditor::undo_redo'
2022-11-02T15:35:52.0764329Z editor\plugins\tiles\tile_set_atlas_source_editor.cpp(2250): warning C4458: declaration of 'undo_redo' hides class member
2022-11-02T15:35:52.0765086Z D:\a\godot\godot\editor\plugins\tiles\tile_set_atlas_source_editor.h(117): note: see declaration of 'TileSetAtlasSourceEditor::undo_redo'

[akien-mga]

Looks good to me.

[akien-mga]

Thanks!