Snyk support

[pascalgrimaud]

Related to #12441

---

Please make sure the below checklist is followed for Pull Requests.

• All continuous integration tests are green
• Tests are added where necessary
• jhipster-online was updated if necessary
• Documentation is added/updated where necessary
• Coding Rules & Commit Guidelines as per our CONTRIBUTING.md document are followed

When you are still working on the PR, consider converting it to Draft (bellow reviewers) and adding skip-ci label, you can still see CI build result at your branch.

[pascalgrimaud]

GitLab CI result:

[pascalgrimaud]

Azure Pipelines result:

[pascalgrimaud]

GitHub Actions result:

[pascalgrimaud]

CircleCI result:

[pascalgrimaud]

Travis CI result:

[pascalgrimaud]

Don't blame me if I didn't test Jenkins, as I don't use Jenkins any more and too lazy for installing, configuring and testing it
But the support with Jenkins is in this PR ! I'm feeling confident as I was helped by the post blog

[DanielFran]

@pascalgrimaud Trusting you on this 😀

[pascalgrimaud]

Thanks @DanielFran : that's why I added screenshots to show my tests, as it's very long to test all CI
But by doing this, I was able to test all @mshima's work with e2e tests in our CI-CD sub gen, and everything works well !

[mshima]

Great work @pascalgrimaud

[pascalgrimaud]

same to you, @mshima !