Enhance cli-test-utils error when "sh" missing from PATH

[t1m0thyj]

What It Does

Fixes #2208

How to Test

Review Checklist
I certify that I have:

• tested my changes
• added/updated automated tests
• updated the changelog
• followed the contribution guidelines

Additional Comments

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.15%. Comparing base (7500654) to head (6d178c2).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2209   +/-   ##
=======================================
  Coverage   91.15%   91.15%           
=======================================
  Files         638      638           
  Lines       19134    19134           
  Branches     3974     3927   -47     
=======================================
  Hits        17442    17442           
  Misses       1691     1691           
  Partials        1        1           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[traeok]

LGTM, thanks Timothy for the fix!

[github-actions]

Release succeeded for the master branch. 🎉

The following packages have been published:

• npm: @zowe/cli-test-utils@7.28.2
• npm: @zowe/core-for-zowe-sdk@7.28.2
• npm: @zowe/zos-uss-for-zowe-sdk@7.28.2
• npm: @zowe/provisioning-for-zowe-sdk@7.28.2
• npm: @zowe/zos-console-for-zowe-sdk@7.28.2
• npm: @zowe/zos-files-for-zowe-sdk@7.28.2
• npm: @zowe/zos-logs-for-zowe-sdk@7.28.2
• npm: @zowe/zosmf-for-zowe-sdk@7.28.2
• npm: @zowe/zos-workflows-for-zowe-sdk@7.28.2
• npm: @zowe/zos-jobs-for-zowe-sdk@7.28.2
• npm: @zowe/zos-tso-for-zowe-sdk@7.28.2
• npm: @zowe/cli@7.28.2

_{Powered by Octorelease 🚀}