Add support for test unit outputs - junit

[jonesy1234]

Is your feature request related to a problem? Please describe.

The current output formats are really great for user feedback however it would be great be able to track the history through other CI/CD tools that pull in test format like junit to track the compliance across multiple runs. We can currently diff between runs from the output but native support would be great.

Describe the solution you'd like
Additional output format for junit or something similar that is supported by common tool as follows:-

• https://docs.aws.amazon.com/codebuild/latest/userguide/test-reporting.html
• https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/test/publish-test-results?view=azure-devops&tabs=trx%2Cyaml

Describe alternatives you've considered

Only alternative I see at the moment is to perform a diff on the current outputs formats such as diff out1.csv out2.csv

Additional context

Discussed in https://steampipe.slack.com/archives/C01UECB59A7/p1638186813353000

[e-gineer]

@jonesy1234 Thanks for raising this issue - agree that support for test formats would be awesome and that JUnit is a good starting point. I particularly appreciated the references you shared there!

Note for potential contributors ... The CLI has a number of formatters already, that produce results using templates. The code for those is available in this directory - https://github.com/turbot/steampipe/tree/main/control/controldisplay. Adding new formatters should be fairly straight forward, and any suggestions to make it even more extensible would be great too!