CI Skip publishing workflow on fork

[jeremiedbb]

This workflow should not run on forks and is annoying because github sends a notification each time you push to fork to tell you that it failed.

[jeremiedbb]

This workflow doesn't publish Python but cloudpickle :)
Result of a quick copy paste.

[jeremiedbb]

by defaults artifacts are kept 90 days. For this workflow we only need them during the workflow run and 1 day is the minimum

[ogrisel]

Thanks for the PR and the pickle emoji in particular.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.73%. Comparing base (8b82151) to head (659378e).
Report is 1 commits behind head on master.

❗ There is a different number of reports uploaded between BASE (8b82151) and HEAD (659378e). Click for more details.

HEAD has 18 uploads less than BASE

Flag	BASE (8b82151)	HEAD (659378e)
	19	1

Additional details and impacted files

@@             Coverage Diff             @@
##           master     #559       +/-   ##
===========================================
- Coverage   96.34%   84.73%   -11.62%     
===========================================
  Files           3        2        -1     
  Lines         575      570        -5     
  Branches      121      102       -19     
===========================================
- Hits          554      483       -71     
- Misses         11       69       +58     
- Partials       10       18        +8     

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