Remove test point infrastructure.

82df7e6f and 9856fef5 updated tests that used test points in preparation for the feature not being available in the C code.

Since tests points are no longer used remove the infrastructure.

Also remove one stray --test option in mock/all that was essentially a noop but no longer works now that the option has been removed.

lib/pgBackRest/Protocol/Base/Master.pm

@@ -268,9 +268,6 @@ sub keepAlive
     if (gettimeofday() - $self->{fKeepAliveTimeout} > $self->{fKeepAliveTime})
     {
         $self->noOp();
-
-        # Keep alive test point
-        &log(TEST, TEST_KEEP_ALIVE);
     }
 }