Mockdevice robot arm

[Twpeak]

What this PR does / why we need it:

Will this PR make the community happier?

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

How is this PR tested

• [x] unit test
• [ ] e2e test
• [ ] other (please specify)

Special notes for your reviewer:

Release note:

[codecov[bot]]

Codecov Report

Base: 47.63% // Head: 48.01% // Increases project coverage by +0.37% :tada:

Coverage data is based on head (792d290) compared to base (ce387b1). Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #342      +/-   ##
==========================================
+ Coverage   47.63%   48.01%   +0.37%     
==========================================
  Files          14       15       +1     
  Lines        1436     1458      +22     
==========================================
+ Hits          684      700      +16     
- Misses        682      688       +6     
  Partials       70       70              

Impacted Files	Coverage Δ
...evice/mockdevice-robot-arm/mockdevice-robot-arm.go	72.72% <0.00%> (ø)

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