Add tune landscape protocol

[andrea-pasquale]

This PR implements a tune landscape protocol, i.e. repeating the cz_virtualz protocol for different values of amplitude and duration of the flux pulse that implements the CZ gate. I've taken inspiration from the NZ paper https://arxiv.org/pdf/1903.02492.pdf.
Eventually we could add different protocols when we want to use more specialized pulse sweeping over specific parameteres, like they are doing in the paper (or with the SNZ), assuming that this is feature is provided by qibolab.

Now the implementation is quite naive since I am using for loops. I would like to use sweepers, but I don't know whether it is possible to sweep 3 parameters at the same time (phase, amplitude and duration in this case)....
I guess have something working with for loops is better than nothing.

After deploying on hardware I want to add also a fitting function.

Checklist:

• Reviewers confirm new code works as expected.
• Tests are passing.
• Coverage does not decrease.
• Documentation is updated.
• Compatibility with Qibo modules (Please edit this section if the current pull request is not compatible with the following branches).
  • Qibo: master
  • Qibolab: main
  • Qibolab_platforms_qrc: main

[codecov]

Codecov Report

Attention: Patch coverage is 98.74214% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 97.31%. Comparing base (e7a18a9) to head (6b7229f).

❗ Current head 6b7229f differs from pull request most recent head 0e69f41. Consider uploading reports for the commit 0e69f41 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #634      +/-   ##
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+ Coverage   97.25%   97.31%   +0.06%     
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  Files         101      103       +2     
  Lines        7471     7610     +139     
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+ Hits         7266     7406     +140     
+ Misses        205      204       -1     

Flag	Coverage Δ
unittests	97.31% <98.74%> (+0.06%)	⬆️

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

Files	Coverage Δ
src/qibocal/protocols/characterization/__init__.py	100.00% <100.00%> (ø)
...ocols/characterization/couplers/coupler_chevron.py	100.00% <100.00%> (ø)
...cterization/couplers/coupler_qubit_spectroscopy.py	100.00% <100.00%> (ø)
...ization/couplers/coupler_resonator_spectroscopy.py	100.00% <100.00%> (ø)
...aracterization/flux_dependence/avoided_crossing.py	87.58% <100.00%> (ø)
...characterization/two_qubit_interaction/__init__.py	100.00% <100.00%> (ø)
.../characterization/two_qubit_interaction/chevron.py	96.47% <100.00%> (+0.21%)	⬆️
...zation/two_qubit_interaction/cz_virtualz_signal.py	100.00% <100.00%> (ø)
...terization/two_qubit_interaction/tune_landscape.py	100.00% <100.00%> (ø)
...ls/characterization/two_qubit_interaction/utils.py	100.00% <100.00%> (ø)
... and 1 more

... and 1 file with indirect coverage changes

[andrea-pasquale]

On hardware everything seems fine: http://login.qrccluster.com:9000/TrK3STtmSfm7laYzWFcRHQ==/

[Jacfomg]

I have the impression the without thinking or having some sweepers for the tuned lanscape protocol it would take over an hour to reproduce the plots presented in the paper. I would leave it in another PR for the time being and I will review the rest of this PR.

[Jacfomg]

Apart from the tune_landscape all the rest seems fine to me.