Cherry-pick #1904: fix _get_property_list failing in thread scenarios

[Zylann]

My latest extension build still uses GodotCpp from the godot-4.5-stable tag for compatibility, but is crashing in Godot 4.6 when expanding custom resources in the inspector (call stack indicates it's not the main thread):

With a similar error in the console:

ERROR: Internal error, property list was not freed by engine!
   at: zylann::voxel::VoxelBlockyModelCube::get_property_list_bind (D:\Projets\Info\Godot\Engine\godot4_fork\modules\voxel\meshers/blocky/voxel_blocky_model_cube.h:11)

That #1904 seems to fix.

Btw, should I then use the 4.5 branch instead of the godot-4.5-stable tag when building releases? Given fixes may have been done, it seems tags are a bit useless besides marking the "first version supporting Godot x.x"

[dsnopek]

We can certainly cherry-pick this! I'm not sure why I didn't mark it for cherry-picking initially

However, I just wanted to point out that master is compatible with Godot 4.5 - you just need to build with scons api_version=4.5

Btw, should I then use the 4.5 branch instead of the godot-4.5-stable tag when building releases? Given fixes may have been done, it seems tags are a bit useless besides marking the "first version supporting Godot x.x"

In the old versioning scheme, yeah, using the 4.5 branch is a good idea, because we only previously made releases synchronized with Godot releases, and so if you only used tags you would miss most of the fixes we regularly cherry-pick