Add check_values to TuningInstance

[be-marc]

• Added check_values flag TuningInstanceSingleCrit and TuningInstanceMultiCrit because ObjectiveTuning is not created by the user (s. https://github.com/mlr-org/bbotk/pull/98)

Issues

If a graph contains required parameters (unrelated to the learner) and check_values = TRUE, self$domain$assert in bbotk::Objective$eval_many() fails with Missing required parameters

[codecov-commenter]

Codecov Report

Merging #257 into master will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #257   +/-   ##
=======================================
  Coverage   90.38%   90.38%           
=======================================
  Files          14       14           
  Lines         156      156           
=======================================
  Hits          141      141           
  Misses         15       15           

Impacted Files	Coverage Δ
R/Tuner.R	100.00% <ø> (ø)
R/ObjectiveTuning.R	100.00% <100.00%> (ø)
R/TuningInstanceMulticrit.R	91.66% <100.00%> (ø)
R/TuningInstanceSingleCrit.R	93.33% <100.00%> (ø)

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