Disable macos tests for pytorch circuit repetition

[scarrazza]

Closes #1313, following the approach discussed during the qibo meeting.

Checklist:

• Reviewers confirm new code works as expected.
• Tests are passing.
• Coverage does not decrease.
• Documentation is updated.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.81%. Comparing base (e8f9f2e) to head (b55dc7f).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1317   +/-   ##
=======================================
  Coverage   99.81%   99.81%           
=======================================
  Files          72       72           
  Lines       10490    10490           
=======================================
  Hits        10471    10471           
  Misses         19       19           

Flag	Coverage Δ
unittests	99.81% <ø> (ø)

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.