Don't compile in support for DSA speed testing if not needed

Don't compile in support for DSA speed testing if not needed

If there is no DSA support in the library we should not compile in support
for speed testing of DSA. We should skip it in much the same way that we
do for other algorithms.

Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/25153)