BashWrapper: Add 'warnFlag' parameter to allow turning off warnings

[rcannood]

Describe your changes

BashWrapper: Add 'warnFlag' parameter to allow turning off warnings

Issue ticket number and link

Closes #xxxx (Replace xxxx with the GitHub issue number)

Checklist before requesting a review

• I have performed a self-review of my code

• Does this PR contain:

  • Breaking changes
  • New functionality
  • Major changes
  • Minor changes
  • Bug fixes

• Proposed changes are described in the CHANGELOG.md

• Relevant unit tests have been added

[codecov]

Codecov Report

Patch coverage: 50.00% and project coverage change: -0.03 ⚠️

Comparison is base (fbcee49) 89.98% compared to head (53a82c3) 89.96%.

❗ Current head 53a82c3 differs from pull request most recent head 24184fb. Consider uploading reports for the commit 24184fb to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #467      +/-   ##
===========================================
- Coverage    89.98%   89.96%   -0.03%     
===========================================
  Files           96       96              
  Lines         3146     3148       +2     
  Branches       460      454       -6     
===========================================
+ Hits          2831     2832       +1     
- Misses         315      316       +1     

Impacted Files	Coverage Δ
src/main/scala/io/viash/wrapper/BashWrapper.scala	96.61% <50.00%> (-0.54%)	⬇️

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[rcannood]

Merging since it's becoming part of a different pr