Automate all dependency building
What does this Merge Request do?
Moves the manual "install Yarn modules" step into its own Make target, and add to the setup Make target.
Merge Request checklist
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Tests added for new functionality. If not, please raise Issue to follow-up. 
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This change is backward compatible. If not, please include steps to communicate to our users. 
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Documentation added/updated, if needed. 
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gdk doctortest added, if needed.