Allow testing the valgrind suppression file in CI

Allow testing the valgrind suppression file in CI

Skip the OPENSSL_cleanup() call from the openssl app and in tests
when OSSL_USE_VALGRIND environment variable is set.

This can be used in the CI to test the valgrind suppressions.

Builds upon https://github.com/openssl/openssl/pull/29573

Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Saša Nedvědický <sashan@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
MergeDate: Tue Feb 10 14:00:54 2026
(Merged from https://github.com/openssl/openssl/pull/29575)