Duplicate the file and func error strings

Duplicate the file and func error strings

Errors raised from a provider that is subsequently unloaded from memory
may have references to strings representing the file and function that
are no longer present because the provider is no longer in memory. This
can cause crashes. To avoid this we duplicate the file and func strings.

Fixes #13623

Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/14213)