Fix scaffold print output folder names
Summary: The names output during the dagster-scaffold output still contained library-tmpl, make them have the new templated folder name instead.
Test Plan: dagster-scaffold library docker now produces same actual output, prints during the command now include the final path
Reviewers: sashank, nate
Reviewed By: sashank
Differential Revision: https://dagster.phacility.com/D5362