Check if any global script class is shadowed by a variable

modules/gdscript/tests/scripts/analyzer/warnings/shadowning.gd

@@ -1,3 +1,5 @@
+class_name ShadowedClass
+
 var member: int = 0
 
 var print_debug := 'print_debug'
@@ -12,5 +14,6 @@ func test():
 	var sqrt := 'sqrt'
 	var member := 'member'
 	var reference := 'reference'
+	var ShadowedClass := 'ShadowedClass'
 
 	print('warn')

modules/gdscript/tests/scripts/analyzer/warnings/shadowning.out

@@ -1,30 +1,34 @@
 GDTEST_OK
 >> WARNING
->> Line: 3
+>> Line: 5
 >> SHADOWED_GLOBAL_IDENTIFIER
 >> The variable "print_debug" has the same name as a built-in function.
 >> WARNING
->> Line: 9
+>> Line: 11
 >> SHADOWED_GLOBAL_IDENTIFIER
 >> The variable "Array" has the same name as a built-in type.
 >> WARNING
->> Line: 10
+>> Line: 12
 >> SHADOWED_GLOBAL_IDENTIFIER
->> The variable "Node" has the same name as a global class.
+>> The variable "Node" has the same name as a native class.
 >> WARNING
->> Line: 11
+>> Line: 13
 >> SHADOWED_GLOBAL_IDENTIFIER
 >> The variable "is_same" has the same name as a built-in function.
 >> WARNING
->> Line: 12
+>> Line: 14
 >> SHADOWED_GLOBAL_IDENTIFIER
 >> The variable "sqrt" has the same name as a built-in function.
 >> WARNING
->> Line: 13
+>> Line: 15
 >> SHADOWED_VARIABLE
->> The local variable "member" is shadowing an already-declared variable at line 1.
+>> The local variable "member" is shadowing an already-declared variable at line 3.
 >> WARNING
->> Line: 14
+>> Line: 16
 >> SHADOWED_VARIABLE_BASE_CLASS
 >> The local variable "reference" is shadowing an already-declared method at the base class "RefCounted".
+>> WARNING
+>> Line: 17
+>> SHADOWED_GLOBAL_IDENTIFIER
+>> The variable "ShadowedClass" has the same name as a global class defined in "shadowning.gd".
 warn