Add targets to skip build of non-installable programs

Add targets to skip build of non-installable programs

These make it possible to split the build into two
parts, e.g., when tests should be built with different
compiler flags than installed software.

Also use these as dependecies where appropriate.

Reviewed-by: Paul Yang <paulyang.inf@gmail.com>
Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
Reviewed-by: Neil Horman <nhorman@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/28302)