Unify typing of variables, constants and parameters in GDScript

modules/gdscript/tests/scripts/analyzer/errors/enum_class_var_init_with_wrong_enum_type.out

@@ -1,2 +1,2 @@
 GDTEST_ANALYZER_ERROR
-Value of type "MyOtherEnum (enum)" cannot be assigned to a variable of type "MyEnum (enum)".
+Cannot assign a value of type MyOtherEnum (enum) to variable "class_var" with specified type MyEnum (enum).

modules/gdscript/tests/scripts/analyzer/errors/enum_local_var_init_with_wrong_enum_type.out

@@ -1,2 +1,2 @@
 GDTEST_ANALYZER_ERROR
-Value of type "MyOtherEnum (enum)" cannot be assigned to a variable of type "MyEnum (enum)".
+Cannot assign a value of type MyOtherEnum (enum) to variable "local_var" with specified type MyEnum (enum).

modules/gdscript/tests/scripts/analyzer/errors/setter_parameter_uses_property_type.out

@@ -1,2 +1,2 @@
 GDTEST_ANALYZER_ERROR
-Value of type "int" cannot be assigned to a variable of type "String".
+Cannot assign a value of type int to variable "x" with specified type String.

modules/gdscript/tests/scripts/analyzer/features/default_arg_convertable.gd

@@ -0,0 +1,6 @@
+func check(arg: float = 3):
+	return typeof(arg) == typeof(3.0)
+
+func test():
+	if check():
+		print('ok')

modules/gdscript/tests/scripts/analyzer/features/default_arg_convertable.out

@@ -0,0 +1,2 @@
+GDTEST_OK
+ok

modules/gdscript/tests/scripts/analyzer/features/null_initializer.gd

@@ -0,0 +1,32 @@
+func check(input: int) -> bool:
+	return input == 1
+
+var recur = null
+var prop = null
+
+func check_arg(arg = null) -> void:
+	if arg != null:
+		print(check(arg))
+
+func check_recur() -> void:
+	if recur != null:
+		print(check(recur))
+	else:
+		recur = 1
+		check_recur()
+
+func test() -> void:
+	check_arg(1)
+
+	check_recur()
+
+	if prop == null:
+		set('prop', 1)
+		print(check(prop))
+		set('prop', null)
+
+	var loop = null
+	while loop != 2:
+		if loop != null:
+			print(check(loop))
+		loop = 1 if loop == null else 2

modules/gdscript/tests/scripts/analyzer/features/null_initializer.out

@@ -0,0 +1,5 @@
+GDTEST_OK
+true
+true
+true
+true

modules/gdscript/tests/scripts/analyzer/features/weak_initializer.gd

@@ -0,0 +1,5 @@
+func test():
+	var bar = 1
+	var foo: float = bar
+	print(typeof(foo))
+	print(foo is float)

modules/gdscript/tests/scripts/analyzer/features/weak_initializer.out

@@ -0,0 +1,3 @@
+GDTEST_OK
+3
+true

modules/gdscript/tests/scripts/analyzer/typed_array_assignment.out

@@ -1,2 +1,2 @@
 GDTEST_ANALYZER_ERROR
-Assigned value for constant "arr" has type Array[String] which is not compatible with defined type Array[int].
+Cannot assign a value of type Array[String] to constant "arr" with specified type Array[int].