CI: Retry test tasks in case of failure to reduce sporadic failures #1770
  Add this suggestion to a batch that can be applied as a single commit.
  This suggestion is invalid because no changes were made to the code.
  Suggestions cannot be applied while the pull request is closed.
  Suggestions cannot be applied while viewing a subset of changes.
  Only one suggestion per line can be applied in a batch.
  Add this suggestion to a batch that can be applied as a single commit.
  Applying suggestions on deleted lines is not supported.
  You must change the existing code in this line in order to create a valid suggestion.
  Outdated suggestions cannot be applied.
  This suggestion has been applied or marked resolved.
  Suggestions cannot be applied from pending reviews.
  Suggestions cannot be applied on multi-line comments.
  Suggestions cannot be applied while the pull request is queued to merge.
  Suggestion cannot be applied right now. Please check back later.
  
    
  
    
PR Summary
PR contributors cannot re-run jobs that sometimes fail sporadically, this will help.
Here is an example of a branch where I made a test fail randomly to show it actually does re-run and end up being green: https://dev.azure.com/powershell/psscriptanalyzer/_build/results?buildId=93559&view=logs&j=c492b3f2-3f7f-545b-9740-4a941d8a8097&t=c5aebf1d-d8d8-5429-6ff5-668d8560bdd2&l=191
PR Checklist
.cs,.ps1and.psm1files have the correct copyright headerWIP:to the beginning of the title and remove the prefix when the PR is ready.