Drop .settings in Qblox modules

[PiergiorgioButtarini]

This PR remove the necessity of having the attribute .settings in each qblox module to store the settings loaded from the runcard.
This was unnecessary since the port object already has the possibility to cache this values.
This PR also fix the test for Qblox controller (thanks @stavros11).
Closes #724

Note:

• Tested on spinq10q (only resonator spectroscopy since is the only possible experiment right now).
• It needs a small change in the platform runcard to work. Solved in Drop offset setting Qblox  qibolab_platforms_qrc#104.

Checklist:

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

[alecandido]

Some trivial metrics (trivial, but still pleasing)

# main                        # HEAD
    143 acquisition.py            143 acquisition.py
    758 cluster_qcm_bb.py         685 cluster_qcm_bb.py
    759 cluster_qcm_rf.py         672 cluster_qcm_rf.py
   1039 cluster_qrm_rf.py         952 cluster_qrm_rf.py
    541 controller.py             524 controller.py
     57 debug.py                   57 debug.py
     61 module.py                 157 module.py
    284 port.py                   284 port.py
    370 q1asm.py                  370 q1asm.py
    234 sequencer.py              234 sequencer.py
    397 sweeper.py                402 sweeper.py
   4643 total                    4480 total

[codecov-commenter]

Codecov Report

Attention: 22 lines in your changes are missing coverage. Please review.

Comparison is base (8bb0327) 63.89% compared to head (614e301) 64.17%.

Files	Patch %	Lines
src/qibolab/instruments/qblox/cluster_qrm_rf.py	36.36%	7 Missing ⚠️
src/qibolab/instruments/qblox/port.py	72.00%	7 Missing ⚠️
src/qibolab/instruments/qblox/cluster_qcm_bb.py	54.54%	5 Missing ⚠️
src/qibolab/instruments/qblox/cluster_qcm_rf.py	72.72%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #736      +/-   ##
==========================================
+ Coverage   63.89%   64.17%   +0.27%     
==========================================
  Files          49       49              
  Lines        5792     5792              
==========================================
+ Hits         3701     3717      +16     
+ Misses       2091     2075      -16     

Flag	Coverage Δ
unittests	64.17% <69.01%> (+0.27%)	⬆️

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[alecandido]

Superseded by #868 and the subsequent rewriting