Also reject internal macros that weren't options in 3.6

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>

scripts/generate_config_checks.py

@@ -37,6 +37,9 @@ def checkers_for_removed_options() -> Iterator[Checker]:
             yield CryptoInternal(option)
         else:
             yield Removed(option, 'Mbed TLS 4.0')
+    for option in (current.internal() - new_public - old_public -
+                   crypto.options() - crypto.internal()):
+        yield Internal(option)
 
 def all_checkers() -> Iterator[Checker]:
     """Yield all checkers."""