GDScript: Improve call analysis

* Add missing `UNSAFE_CALL_ARGUMENT` warning.
* Fix `Object` constructor.
* Display an error for non-existent static methods.

modules/gdscript/tests/scripts/analyzer/errors/call_not_existing_static_method.gd

@@ -0,0 +1,7 @@
+# GH-73283
+
+class MyClass:
+	pass
+
+func test():
+	MyClass.not_existing_method()

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

@@ -0,0 +1,2 @@
+GDTEST_ANALYZER_ERROR
+Static function "not_existing_method()" not found in base "MyClass".

modules/gdscript/tests/scripts/analyzer/errors/object_invalid_constructor.gd

@@ -0,0 +1,4 @@
+# GH-73213
+
+func test():
+	print(Object())

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

@@ -0,0 +1,2 @@
+GDTEST_ANALYZER_ERROR
+Invalid constructor "Object()", use "Object.new()" instead.