APPS: Reduce deprecation warning suppression - ENGINE

APPS: Reduce deprecation warning suppression - ENGINE

Some of our apps turn off deprecation warnings solely for the sake of
ENGINE, and thereby shadowing other deprecations that we should take
better care of.

To solve this, all apps ENGINE functionality is move to one file,
where deprecation warning suppression is activate, and the same
suppression can then easily be removed in at least some of the apps.
Any remaining suppression that we still need to deal with should
happen as separate efforts.

Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/13044)