Neuter the remainder of the ameth lib

Neuter the remainder of the ameth lib

The few pieces of the ameth lib that will stay in libcrypto were moved to
p_lib.c recently. The functions that still are in ameth_lib.c will be
removed in the next major bump. With disabled EVP_PKEY_asn1_add{0,_alias}()
API they are completely useless now and they are getting in the way of more
ameth surgery. Rip out their guts and turn them into stubs that do nothing
but push an error onto the stack.

ok jsing