Refactor Keithley 2600 driver to use ParameterWithSetpoints for fast sweep

[trlemon]

Background

The doFastSweep method relies on "old" technology from qcodes_loop, and it also returns a Qcodes dataset which may not be desirable for all applications. Instead, it would be better to use ParameterWithSetpoints and return a numpy array.

Summary of Changes

• Remove dependence on qcodes_loop
• Use ParameterWithSetpoints with additional parameters for configuration.
• Return fast sweep data as numpy array instead of qcodes dataset.
• Add functionality to perform both 1D (single channel) and 2D (two channels) buffered sweeps.

[codecov]

Codecov Report

❌ Patch coverage is 85.43689% with 30 lines in your changes missing coverage. Please review.
✅ Project coverage is 60.20%. Comparing base (5d8e488) to head (3761543).

Files with missing lines	Patch %	Lines
...odes/instrument_drivers/Keithley/_Keithley_2600.py	85.43%	30 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7851      +/-   ##
==========================================
+ Coverage   59.94%   60.20%   +0.26%     
==========================================
  Files         352      352              
  Lines       31933    32075     +142     
==========================================
+ Hits        19143    19312     +169     
+ Misses      12790    12763      -27     

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[astafan8]

looks promising!

[astafan8]

is it ready for the final review, can it exit the draft mode? :)