Remove ENGINESDIR variable and engines installation from Makefiles.

Remove ENGINESDIR variable and engines installation from Makefiles.

For compatibility reasons, OPENSSL_ENGINES_DIR and OPENSSL_INFO_ENGINES_DIR
are still supported but return values like with engines disabled.

The OPENSSL_ENGINES environment variable will be removed with engine
removal later.

Resolves: https://github.com/openssl/project/issues/1425

Signed-off-by: Milan Broz <gmazyland@gmail.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Saša Nedvědický <sashan@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>
Reviewed-by: Norbert Pocs <norbertp@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/29305)