Fix update in readout optimization protocols

[andrea-pasquale]

Closes #599.

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

Merging #602 (60d9819) into main (158e7e6) will decrease coverage by 0.10%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #602      +/-   ##
==========================================
- Coverage   96.24%   96.14%   -0.10%     
==========================================
  Files          96       96              
  Lines        6551     6594      +43     
==========================================
+ Hits         6305     6340      +35     
- Misses        246      254       +8     

Flag	Coverage Δ
unittests	96.14% <100.00%> (-0.10%)	⬇️

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

Files	Coverage Δ
...zation/readout_optimization/resonator_amplitude.py	100.00% <100.00%> (ø)
...zation/readout_optimization/resonator_frequency.py	99.00% <100.00%> (+0.10%)	⬆️
...readout_optimization/twpa_calibration/frequency.py	100.00% <100.00%> (ø)
...t_optimization/twpa_calibration/frequency_power.py	100.00% <100.00%> (ø)
...ion/readout_optimization/twpa_calibration/power.py	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes