Reverting Qibojit and Qibotn dependencies

[BrunoLiegiBastonLiegi]

Small PR to restore the dependency to qibojit/main and qibotn/main.

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 (9538523) to head (5697bdf).
Report is 4 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1310   +/-   ##
=======================================
  Coverage   99.81%   99.81%           
=======================================
  Files          72       72           
  Lines       10517    10517           
=======================================
  Hits        10498    10498           
  Misses         19       19           

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

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[MatteoRobbiati]

Thanks.