Update LAVA related CI logs to make it more user-friendly

1. Make logs for debug silent by default to reduce redundant CI logs.
2. Print TF-M test log link together with its build job and LAVA test
   job, to make it much easier for users to identify the test result of
   a specific config.
3. Show TF-M test log link in the failure tests summary. Compared with
   LAVA job log, TF-M test log is more readable for TF-M CI users.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: I7051022602de4e05b7f31c0dcb7a1c285d8c4c49
2 files changed