CI: run server and dispatcher tests in parallel on aarch64

pytest-xdist is only installed on aarch64 images for the moment.

Signed-off-by: Rémi Duraffort <remi.duraffort@linaro.org>
17 jobs from aarch64 in 3 minutes and 48 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Test
failed #32483
aarch64
aarch64/dispatcher-debian-10

00:03:48

canceled #32484
aarch64
aarch64/server-debian-10

00:02:30

passed #32481
amd64
amd64/dispatcher-debian-10

00:02:39

passed #32479
amd64
amd64/dispatcher-debian-9

00:02:36

passed #32482
amd64
amd64/server-debian-10

00:01:56

passed #32480
amd64
amd64/server-debian-9

00:02:23

 
  Analyze
skipped #32485
amd64
black
skipped #32487
amd64
code_quality
skipped #32486
amd64
codestyle
skipped #32490
amd64
job-schema
skipped #32488
amd64
pylint
skipped #32489
dind amd64 allowed to fail
sast
 
  Build
skipped #32493
amd64
amd64/pkg-debian-10
skipped #32492
amd64
amd64/pkg-debian-9
skipped #32491
amd64
doc
 
  Docker
skipped #32494
dind amd64
amd64/lava-dispatcher
skipped #32495
dind amd64
amd64/lava-server
 
Name Stage Failure
failed
aarch64/dispatcher-debian-10 Test
  /usr/lib/python3/dist-packages/jinja2/lexer.py:587: DeprecationWarning: invalid escape sequence '\s'
.decode('unicode-escape')

-- Docs: https://docs.pytest.org/en/latest/warnings.html
======== 3 failed, 344 passed, 3 skipped, 114 warnings in 94.74 seconds ========
Uploading artifacts...
dispatcher.xml: found 1 matching files
Uploading artifacts to coordinator... ok id=32483 responseStatus=201 Created token=uX_Rku-W
ERROR: Job failed: exit code 1