Add a performance test for OSSL_PROVIDER_do_all()

Add a performance test for OSSL_PROVIDER_do_all()

This tests calls the OSSL_PROVIDER_do_all() function repeatedly in a loop.
This function can be called directly by user code, but is also used during
the initialisation of an SSL_CTX to discover TLS capabilities from
providers (e.g. pluggable groups etc).

The underlying internal function ossl_provider_doall_activated() will
also be tested by this. That function is called during algorithm fetching
(if the algorithms have not yet been cached).

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/tools/pull/154)