Fix/reading dir as file

[love-bhardwaj]

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

What does this PR do?

Fixes issue reported in #61

Checks if a file or directory. If a directory formulates a new path. EOENT error when a file is not found and we are unable to load it is handled on the CLI side and ignored.

Updated the test for nested .snyk file where parent or grandparent in the path has .snyk in the name.

How should this be manually tested?

Steps to reproduce:

1. create a directory for a project (can be empty) which contains .snyk mkdir -p ~/test/my.snykProject/project
2. create an empty .snyk file in the project. touch ~/test/my.snykProject/project/.snyk
3. change into project directory cd ~/test/my.snykProject/project
4. run snyk test -d

Any background context you want to provide?

This prevents users from running Snyk in CI/CD pipelines. Read ZD ticket for more context.

What are the relevant tickets?

We have an open ZD Ticket for this.

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All committers have signed the CLA.

[snyksec]

🎉 This PR is included in version 1.22.2 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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