Refactor Agilent drivers

[jenshnielsen]

This is an example of applying #4412 to Agilent drivers

• Convert attributes to be assigned using automatic tool
• Move model specific parameters into submodels so they can be declared statically
• Document baseclass and disable documentation of inherited attributes. This is such that the duplication is reduced and the docs becomes more readable.

• newsfragment

[codecov]

Codecov Report

Attention: Patch coverage is 29.16667% with 51 lines in your changes are missing coverage. Please review.

Project coverage is 67.62%. Comparing base (8713dbc) to head (6959423).

Files	Patch %	Lines
...codes/instrument_drivers/agilent/Agilent_E8267C.py	0.00%	18 Missing ⚠️
...odes/instrument_drivers/agilent/_Agilent_344xxA.py	14.28%	12 Missing ⚠️
...codes/instrument_drivers/agilent/Agilent_E8257D.py	11.11%	8 Missing ⚠️
...codes/instrument_drivers/agilent/Agilent_34410A.py	54.54%	5 Missing ⚠️
...codes/instrument_drivers/agilent/Agilent_34411A.py	54.54%	5 Missing ⚠️
...codes/instrument_drivers/agilent/Agilent_34401A.py	66.66%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6089      +/-   ##
==========================================
- Coverage   67.67%   67.62%   -0.05%     
==========================================
  Files         352      352              
  Lines       30704    30740      +36     
==========================================
+ Hits        20780    20789       +9     
- Misses       9924     9951      +27     

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