Rigol + R&S drivers avoid internal dependency on dynamic attributes

[jenshnielsen]

This means that all attributes used internally in the drivers type check even if __get_attr__ is removed

Cherrypicked from #7845

[codecov]

Codecov Report

❌ Patch coverage is 36.36364% with 28 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.95%. Comparing base (a066b8b) to head (f4df9e3).
⚠️ Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
src/qcodes/instrument_drivers/rohde_schwarz/ZNB.py	7.69%	12 Missing ⚠️
...c/qcodes/instrument_drivers/rigol/Rigol_DS1074Z.py	11.11%	8 Missing ⚠️
...qcodes/instrument_drivers/rohde_schwarz/RTO1000.py	65.00%	7 Missing ⚠️
...rc/qcodes/instrument_drivers/rigol/Rigol_DG4000.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7910      +/-   ##
==========================================
+ Coverage   59.94%   59.95%   +0.01%     
==========================================
  Files         352      352              
  Lines       31937    31949      +12     
==========================================
+ Hits        19145    19156      +11     
- Misses      12792    12793       +1     

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