#280 - Improve printer graphics tests

[vintagepc]

Description

Removes the stock firmware from graphics tests so they don't take as long

Behaviour/ Breaking changes

Should not break anything, but should speed up tests.

Have you tested the changes?

Locally, also build system will verify

Other

• Also adds some expanded testing for the LED code and clicks.

Linked issues:

• Closes [IMPROVEMENT] - Shorten some of the graphics tests.  #280

[codecov-io]

Codecov Report

Merging #281 into master will increase coverage by 0.38%.
The diff coverage is 94.11%.

@@            Coverage Diff             @@
##           master     #281      +/-   ##
==========================================
+ Coverage   89.11%   89.49%   +0.38%     
==========================================
  Files         140      140              
  Lines        6520     6518       -2     
==========================================
+ Hits         5810     5833      +23     
+ Misses        710      685      -25     

Impacted Files	Coverage Δ
parts/boards/MiniRambo.h	100.00% <ø> (ø)
parts/printers/Prusa_MK2_13.cpp	98.51% <ø> (+11.10%)	⬆️
parts/printers/Prusa_MK2_13.h	100.00% <ø> (ø)
parts/boards/MiniRambo.cpp	97.93% <83.33%> (-2.07%)	⬇️
utility/GLObj.cpp	93.14% <100.00%> (-1.75%)	⬇️
utility/MK2_Full.cpp	100.00% <100.00%> (+1.02%)	⬆️
utility/MK3S_Bear.cpp	100.00% <100.00%> (+1.35%)	⬆️
utility/MK3S_Lite.cpp	100.00% <100.00%> (+1.51%)	⬆️
utility/MK3SGL.cpp	89.82% <0.00%> (-0.98%)	⬇️
... and 5 more

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