Reduce serial commands, rename to match naming convention

[joelaugustine099]

reduces backplane communication from taking 2 channels per signal to 1 channel per signal.

[codecov]

Codecov Report

Attention: Patch coverage is 14.28571% with 12 lines in your changes missing coverage. Please review.

Project coverage is 54.24%. Comparing base (dde12ca) to head (5e4db66).
Report is 3 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/navigate/model/devices/galvo/asi.py	0.00%	7 Missing ⚠️
src/navigate/model/devices/remote_focus/asi.py	0.00%	5 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1115   +/-   ##
========================================
  Coverage    54.24%   54.24%           
========================================
  Files          186      186           
  Lines        21420    21420           
========================================
  Hits         11619    11619           
  Misses        9801     9801           

Flag	Coverage Δ
unittests	54.24% <14.28%> (ø)

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