Make the test output show how long each test takes by default.

Make the test output show how long each test takes by default.

Unless we have reduced the verbosity level, or overridden it with
a HARNESS_TIMER setting.

This makes it easier to realize when you are making a test that is
starting to dominate testing time for developers, and makes it
easier for developers to see it.

For: https://github.com/openssl/project/issues/1767

Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Saša Nedvědický <sashan@openssl.org>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/29408)