Cleanup of Zi drivers

[wvlothuizen]

Changes proposed in this pull request:

• removed duplicates between ZI_HDAWG8.init and ZI_HDAWG_core.init
• improved grouping of related functionality
• replaced printf by logging
• introduced f-string literals for improved readability (and speed)

The changes in UHFQuantumController.py are difficult to track, because there are a lot of moves. The best I could find was to paste both versions into https://www.diff-text.com/diff-text-combined-navigation.aspx, and tick option 'don't show identical paragraphs'. Note that branch 'develop' contained function snapshot_base twice, so one is removed.

Can you have a look @MiguelSMoreira

[codecov-io]

Codecov Report

Merging #600 into develop will increase coverage by <.01%. The diff coverage is 60.97%.

@@             Coverage Diff             @@
##           develop     #600      +/-   ##
===========================================
+ Coverage    42.95%   42.96%   +<.01%     
===========================================
  Files          315      315              
  Lines        66681    66658      -23     
===========================================
- Hits         28646    28638       -8     
+ Misses       38035    38020      -15

Impacted Files	Coverage Δ
...physical_instruments/ZurichInstruments/ZI_tools.py	0% <ø> (ø)	:arrow_up:
...cal_instruments/ZurichInstruments/ZI_HDAWG_core.py	46.66% <18.18%> (-0.84%)	:arrow_down:
...hysical_instruments/ZurichInstruments/ZI_HDAWG8.py	32.65% <35.13%> (-0.01%)	:arrow_down:
...truments/ZurichInstruments/UHFQuantumController.py	54.59% <68.67%> (+1.18%)	:arrow_up:
...nstruments/ZurichInstruments/ZI_base_instrument.py	76.54% <84.84%> (-0.59%)	:arrow_down:
...vers/meta_instrument/qubit_objects/qubit_object.py	22.9% <0%> (+0.1%)	:arrow_up:

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