GDScript: Fix false positive cases of ENUM_VARIABLE_WITHOUT_DEFAULT

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

@@ -7,3 +7,17 @@ var has_no_zero: HasNoZero # Warning, because there is no `0` in the enum.
 func test():
 	print(has_zero)
 	print(has_no_zero)
+
+
+# GH-94634. A parameter is either mandatory or has a default value.
+func test_no_exec(param: HasNoZero) -> void:
+	print(param)
+
+	# Loop iterator always has a value.
+	for i: HasNoZero in HasNoZero.values():
+		print(i)
+
+	match param:
+		# Pattern bind always has a value.
+		var x:
+			print(x)