ADD integration artefacts store step to circle.yml

[ndelangen]

Issue: -if the integration step failed on CI, locally passes, it's hard to debug-

What I did

Added a step to the integration task to store screenshots as artefacts

How to test

Run the CI
Check if CI stored images

[codecov]

Codecov Report

Merging #2182 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2182   +/-   ##
=======================================
  Coverage   21.43%   21.43%           
=======================================
  Files         263      263           
  Lines        5803     5803           
  Branches      694      697    +3     
=======================================
  Hits         1244     1244           
+ Misses       4039     4023   -16     
- Partials      520      536   +16

Impacted Files	Coverage Δ
app/react/src/server/config/babel.js	0% <0%> (-100%)	⬇️
app/react/src/server/babel_config.js	0% <0%> (-77.42%)	⬇️
app/vue/src/server/utils.js	0% <0%> (-53.58%)	⬇️
addons/knobs/src/components/types/Number.js	8.06% <0%> (ø)	⬆️
.../ui/src/modules/ui/components/left_panel/header.js	29.62% <0%> (ø)	⬆️
lib/ui/src/modules/ui/configs/handle_keyevents.js	33.33% <0%> (ø)	⬆️
addons/knobs/src/components/types/Object.js	5.81% <0%> (ø)	⬆️
lib/ui/src/modules/ui/configs/handle_routing.js	28.04% <0%> (ø)	⬆️
...s/left_panel/stories_tree/tree_decorators_utils.js	45.23% <0%> (ø)	⬆️
addons/storyshots/src/storybook-channel-mock.js	0% <0%> (ø)	⬆️
... and 27 more

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[ndelangen]

OK, so what I was afraid for when introducing this happens:
font-rendering on the different platform is different, and this is affecting causes false negatives:

Does not block this PR, as this makes it visible to us, but something that must be addressed for longtime usage of screenshots as regression detection.

[Hypnosphi]

We should probably use something like saucelabs to collect images on linux machines
Another option is to run a local docker with the same image we use on CI

[ndelangen]

Another option is to run a local docker with the same image we use on CI

interesting thought!