testresult: Add information about other links under testresult server

Added information about

 - /qtmetrics/
 - /forms/release-testing/
 - /ci/status/

Change-Id: I12de38113b7755062969a44c4726a35f972401bb
Reviewed-by: Simo Fält <simo.falt@digia.com>
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>