Remove OPENSSL_INIT_ENGINE_* definitions

Remove OPENSSL_INIT_ENGINE_* definitions

Keeping OPENSSL_INIT_ENGINE_ALL_BUILTIN to be defined always to zero as
it might be the most used one outside of the library, meanwhile keeping
the others undefined unless OPENSSL_ENGINE_STUBS is defined.

Resolves: https://github.com/openssl/project/issues/1428

Signed-off-by: Norbert Pocs <norbertp@openssl.org>
Reviewed-by: Saša Nedvědický <sashan@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Saša Nedvědický <sashan@openssl.org>
Reviewed-by: Eugene Syromiatnikov <esyr@openssl.org>
Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/29305)