Allow FVP jobs to not use telnet for a console connection

For monitor test jobs which need no interaction, let the FVP
parameters in the job deal with stdout, so that monitor tests can
use the already open shell connection.

Change-Id: I66d9923f50ba0f579e3ab29c651f80726b622638
15 jobs for fvp-telnet in 14 minutes and 31 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Test
passed #102732
amd64
dispatcher-debian-10

00:02:23

passed #102734
amd64
dispatcher-debian-11

00:02:33

passed #102733
amd64
server-debian-10

00:03:01

passed #102735
amd64
server-debian-11

00:05:25

 
  Analyze
passed #102736
amd64-dind
bandit-sast

00:00:55

passed #102737
amd64
black

00:00:41

passed #102738
amd64
code_quality

00:00:26

passed #102739
amd64
coverage

00:06:21

59.33%
passed #102740
amd64
dockerfiles

00:00:24

passed #102742
amd64
pylint

00:03:01

passed #102741
amd64
schemas

00:00:37

 
  Build
passed #102744
amd64
debian/10

00:01:38

passed #102743
amd64
doc

00:00:44

passed #102745
amd64-dind
docker-amd64-dispatcher

00:01:50

passed #102746
amd64-dind
docker-amd64-server

00:02:41