OpenSSL: Load OpenSSL 3.0 legacy provider but let default be loaded

OpenSSL: Load OpenSSL 3.0 legacy provider but let default be loaded

The default provider is being loaded here explicitly only because
OSSL_PROVIDER_load() disables the fallback provider loading (on either
success or failure). If the legacy provider fails to load, which it may
in some configurations, it will never load the default provider.

Just use the formulation which attempts to load without changing the
fallback behavior.

"default" will still be/only be loaded if no other provider (notably
FIPS) is loaded to provide algorithms.

Signed-off-by: Norman Hamer <nhamer@absolute.com>