[Editor] Separate editor_node.cpp for SCU to prevent errors

[AThousandShips]

Due to defines introduced by platform/windows/platform_gl.h SCU builds break on MSVC, alternative solution would be to explicitly udefine like this, but felt this was the least hacky solution:

diff --git a/editor/editor_node.cpp b/editor/editor_node.cpp
index 32e6126225..54f3715bf7 100644
--- a/editor/editor_node.cpp
+++ b/editor/editor_node.cpp
@@ -169,6 +169,13 @@

 #if defined(GLES3_ENABLED)
 #include "drivers/gles3/rasterizer_gles3.h"
+
+// Cleanup nasty defines.
+#undef CreateDialog
+#undef ERROR
+#undef MOD_ALT
+#undef MOD_SHIFT
+#undef MOD_META
 #endif

 EditorNode *EditorNode::singleton = nullptr;
diff --git a/scu_builders.py b/scu_builders.py
index 041056fd68..fc5461196f 100644
--- a/scu_builders.py
+++ b/scu_builders.py
@@ -290,7 +290,7 @@ def generate_scu_files(max_includes_per_scu):
     process_folder(["drivers/unix"])
     process_folder(["drivers/png"])

-    process_folder(["editor"], ["file_system_dock", "editor_resource_preview", "editor_node"], 32)
+    process_folder(["editor"], ["file_system_dock", "editor_resource_preview"], 32)
     process_folder(["editor/debugger"])
     process_folder(["editor/debugger/debug_adapter"])
     process_folder(["editor/export"])

Or there might be some way to prevent these weird defines being made, but this should be the most simple solution

[AThousandShips]

As discussed in:

• Update rendering driver name on fallbacks. Fix rendering driver/method in the editor system info. #95887

A more complete fix would be to separate out this functionality into a separate OS function, but this will fix SCU builds in the meantime (and editor_node.cpp is pretty huge anyway so I don't think it's critical to keep it in the same SCU block)

[KoBeWi]

No idea what it does, but it fixes the problem.

[AThousandShips]

We'd have to see if we want this separate in SCU builds or not (I haven't compared but I would suspect that this improves general compilation anyway when changing small files in the editor directory, as this file is so big)

Testing and it seems that the time to recompile is essentially unchanged if editing another file sharing the same SCU file with editor_node.cpp, but recompiling changes to editor_node.cpp is a few seconds faster in my case, but it's not worsened, but it matters little in the end so we can remove this exception in the SCU builders later if wanted, but I think it might be useful in itself

[AThousandShips]

Superseded by:

• Store GLES over GL status in the OS to avoid direct renderer includes in the editor. #96525