e2e: More reliable output files check

[odeimaiz]

What do these changes do?

There are some e2e and p2e tests that fail checking output files and the tests still pass. This PR tries to fix those false positives.
Funny enough, I don't see why these error show up in the first place. Therefore, I also print the expected vs received.

Related issue/s

How to test

Checklist

[codecov]

Codecov Report

Merging #3432 (794b59a) into master (566446d) will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master   #3432   +/-   ##
======================================
  Coverage    83.3%   83.3%           
======================================
  Files         824     824           
  Lines       34918   34918           
  Branches     1254    1254           
======================================
  Hits        29090   29090           
  Misses       5640    5640           
  Partials      188     188           

Flag	Coverage Δ
integrationtests	68.2% <ø> (-0.1%)	⬇️
unittests	80.1% <ø> (-0.1%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
.../simcore_service_catalog/db/repositories/groups.py	67.5% <0.0%> (-5.5%)	⬇️
...tor_v2/modules/dynamic_sidecar/scheduler/_utils.py	90.8% <0.0%> (-1.2%)	⬇️
...simcore_service_director_v2/modules/node_rights.py	98.1% <0.0%> (-1.0%)	⬇️
...imcore_service_webserver/garbage_collector_core.py	69.8% <0.0%> (-0.7%)	⬇️
.../director/src/simcore_service_director/producer.py	67.3% <0.0%> (-0.3%)	⬇️
...tor_v2/modules/dynamic_sidecar/docker_api/_core.py	96.5% <0.0%> (+1.0%)	⬆️
.../simcore_service_catalog/services/access_rights.py	87.5% <0.0%> (+1.2%)	⬆️
...mcore_service_webserver/garbage_collector_utils.py	87.1% <0.0%> (+1.2%)	⬆️
...r_v2/modules/dynamic_sidecar/docker_api/_volume.py	100.0% <0.0%> (+1.6%)	⬆️
...rc/simcore_service_catalog/db/repositories/dags.py	47.2% <0.0%> (+2.7%)	⬆️

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