ENCODER: use property definitions instead of getting implementation parameters

ENCODER: use property definitions instead of getting implementation parameters

The OSSL_ENCODER library used to ask each encoder implementation for
certain data in form of parameters to place them correctly in the
encoder chain, if at all.  These parameters were duplicates of
properties of those same implementations, and therefore unnecessarily
redundant.

Now that we have functionality to query property definition values,
those duplicates are no longer needed, and are therefore not looked at
any more.

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15570)