Publish result of auto grading to GitHub checks

[uhafner]

No description provided.

[codecov]

Codecov Report

Merging #81 into master will increase coverage by 0.47%.
The diff coverage is 96.07%.

@@             Coverage Diff              @@
##             master      #81      +/-   ##
============================================
+ Coverage     94.80%   95.27%   +0.47%     
- Complexity       18       28      +10     
============================================
  Files             6        7       +1     
  Lines            77      127      +50     
  Branches          3        6       +3     
============================================
+ Hits             73      121      +48     
- Misses            2        3       +1     
- Partials          2        3       +1     

Impacted Files	Coverage Δ	Complexity Δ
...ns/plugins/grading/AutoGradingChecksPublisher.java	95.23% <95.23%> (ø)	9.00 <9.00> (?)
...in/java/io/jenkins/plugins/grading/AutoGrader.java	95.23% <100.00%> (+0.79%)	4.00 <0.00> (ø)
...nkins/plugins/grading/JenkinsAnalysisSupplier.java	100.00% <100.00%> (ø)	4.00 <1.00> (+1.00)

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