### Godot version

4.0 rc 6

### System information

win 11

### Issue description

The suffix for target params is "m" which I think is meters, but that doesn't make any sense for 2D.

### Steps to reproduce

just make a skeletonmodification2dtwoboneik

### Minimal reproduction project

n/a
#include "skeleton_modification_2d_twoboneik.h"
#include "scene/2d/skeleton_2d.h"
#ifdef TOOLS_ENABLED
#include "editor/editor_settings.h"
#endif 
bool SkeletonModification2DTwoBoneIK::_set(const StringName &p_path, const Variant &p_value) {
	String path = p_path;
	if (path == "joint_one_bone_idx") {
		set_joint_one_bone_idx(p_value);
	} else if (path == "joint_one_bone2d_node") {
		set_joint_one_bone2d_node(p_value);
	} else if (path == "joint_two_bone_idx") {
		set_joint_two_bone_idx(p_value);
	} else if (path == "joint_two_bone2d_node") {
		set_joint_two_bone2d_node(p_value);
	}
#ifdef TOOLS_ENABLED
	else if (path.begins_with("editor/draw_gizmo")) {
		set_editor_draw_gizmo(p_value);
	} else if (path.begins_with("editor/draw_min_max")) {
		set_editor_draw_min_max(p_value);
	}
#endif 
	else {
		return false;
	}
	return true;
}
bool SkeletonModification2DTwoBoneIK::_get(const StringName &p_path, Variant &r_ret) const {