refactor: remove utils.options / utils.object.shallowCopy
#14156
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Summary
This PR removes function
utils.options(lib/utils.js) which shallow-copies objects, which is now solved with JS-native spread-operator.i got this idea because of #14155.
my only concern would be the removal of
clone's that was done previously (with 6820605), no tests fail and the comments mentioned it was becauseutils.optionsdirectly assigned to the second parameter.as for performance, i have not measured, but i would assume it is about the same, if not better thanks to the removal of
clones