chore(nodejs_templates): add script logging to node_library populate-secrets.sh

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[codecov[bot]]

Codecov Report

Merging #196 into master will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #196   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         1           
  Lines           67        67           
  Branches        15        14    -1     
=========================================
  Hits            67        67           

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[gcf-merge-on-green[bot]]

Your PR has attempted to merge for 3 hours. Please check that all required checks have passed, you have an automerge label, and that all your reviewers have approved the PR

[gcf-merge-on-green[bot]]

Your PR has attempted to merge for 3 hours. Please check that all required checks have passed, you have an automerge label, and that all your reviewers have approved the PR