chore: redirect some test output to serial port 3

[nolanmar511]

TESTED: Confirmed output from nvm install for presubmit system test appeared in GCP logging console.

[codecov]

Codecov Report

Merging #453 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #453   +/-   ##
=======================================
  Coverage   75.94%   75.94%           
=======================================
  Files           4        4           
  Lines         212      212           
  Branches       24       24           
=======================================
  Hits          161      161           
  Misses         48       48           
  Partials        3        3

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[aalexand]

npm audit reports the error below, should it be fixed?

#!/bin/bash -eo pipefail
npm audit
=== npm audit security report ===                        
                                                                                
                                                                                
                                 Manual Review                                  
             Some vulnerabilities require your attention to resolve             
                                                                                
          Visit https://go.npm.me/audit-guide for additional guidance           
                                                                                
                                                                                
  Moderate        Denial of Service                                             
                                                                                
  Package         js-yaml                                                       
                                                                                
  Patched in      >=3.13.0                                                      
                                                                                
  Dependency of   mocha [dev]                                                   
                                                                                
  Path            mocha > js-yaml                                               
                                                                                
  More info       https://nodesecurity.io/advisories/788                        
                                                                                
found 1 moderate severity vulnerability in 2736 scanned packages
  1 vulnerability requires manual review. See the full report for details.
Exited with code 1

[nolanmar511]

npm audit error is not currently fixable. We're waiting for mocha to cut a new release.
mochajs/mocha#3854