Use idomatic make conventions for webpack:paths
Use idomatic make conventions for webpack:paths

webpack:paths writes a file that is always the same (or should be) when
run, so to speed up the task, have `webpack:paths` simply have a file
task ('config/webpack/paths.json') be it's prerequisite, and it will not
run it if the file already exists.

ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic