fix: filter out file content from iac test --experimental analytics

[aron]

• Ready for review
• Follows CONTRIBUTING rules
• Reviewed by Snyk internal team

What does this PR do?

We have a minor bug in our Snyk CLI that when the snyk iac test --experimental command is run with a directory instead of a single file we include the iacDirFiles on the options object. This options object is then logged as part of the analytics flow and sent to Big Query. We do not want to be storing user file content in any part of our system so this needs to be filtered out here.

This PR filters the File content and JSON output from the iacDirFiles property added to the options object in the test command and adds a smoke test and unit test to assert that the content is not present.

This is not a long term strategy for solving this issue but fixes the immediate problem that prevents users from adopting the beta. In future we'll want to decouple the file + parsed content from any metadata and ensure that the file content is only passed where needed and discarded when used. We should also look into using a whitelist for the logger to only allow specific arguments to be logged.

Where should the reviewer start?

Start at the smoke tests then the test() function and finish up with the unit tests. The unit tests are really a temporary measure I think to ensure that the iacDirFiles object is clean, we can remove the tests when the flow has been refactored.

How should this be manually tested?

Run the following and verify that the "args" property under analytics is clean of file content.

node ./dist/cli iac test -d --experimental ./test/fixtures/iac/file-logging

[github-actions]

	Warnings
⚠️	Looks like you added a new Tap test. Consider making it a Jest test instead. See files like test/*.spec.ts for examples. Files found: test/fixtures/iac/file-logging/file_content_logging.yaml

	Messages
📖	You are modifying something in test/smoke directory, yet you are not on the branch starting with smoke/. You can prefix your branch with smoke/ and Smoke tests will trigger for this PR.

Generated by 🚫 dangerJS against 0a760fe

[github-actions]

Expected release notes (by @rontalx)

fixes:
file content in iac analytics (0a760fe)

• I hereby acknowledge these release notes are 🥙 AWESOME 🥙

[rontalx]

I mistakenly messed up the commits, re-opening PR here:
#1719