Importing objects with and without _nav causes node name collision

[lyuma]

Godot version

4.0beta16+0810eca

System information

Windows 10

Issue description

The function in ResourceImporterScene::_pre_fix_node which handles suffixes such as _col or _vehicle or _nav removes the suffix, which can cause a name collision with another node.

Due to the API used (set_name followed by replace_by), it can cause a name conflict to occur.

Elsewhere in the gltf importer, an explicit uniqueness is guaranteed, and additionally Node::add_child(..., true) protects against duplicate names in a better way.

I think it would be better to avoid removing the extension, but this would be compat breaking. Maybe we can add an option in 4.1 or later. (Not removing the extension would reduce the risk of affecting documents in which the "_wheel" naming was accidental, as in this issue: #72419 )

Steps to reproduce

1. Open the attached project.
2. New inherited scene on the blend file.
3. Notice some node names are duplicated nondeterministicly with the @ symbol
   

Minimal reproduction project

Duplicate_Collider_Name_Test.zip

[rburing]

There actually is logic to prevent the rename (so keep the suffix) if there would be a clash and the suffix is col, convcol, or occ:

godot/editor/import/resource_importer_scene.cpp

Lines 783 to 787 in 0810eca

	if (!fixed_name.is_empty()) {
	if (mi->get_parent() && !mi->get_parent()->has_node(fixed_name)) {
	mi->set_name(fixed_name);
	}
	}

But it looks like this was not done in other cases.

I agree life would be simpler if we would not do the renames.

[lyuma]

Reproduces on godot-tests/tests/blend_export too, so this seems like a regression of some sort.

file 32678-respect-import-hints-with-empty.blend

Also 43563-asset-collection-test.blend

Also a weird thing: colldiers do not remove the suffix. See here it has Marker-col: