Introduce support for kaniko docker images

[cwholmes]

• All tests passed. If this feature is not already covered by the tests, I added new tests.

---

My team uses kaniko a lot for building docker images inside a kubernetes cluster (using the kubernetes-plugin). This currently requires adding dind as a container and pushing through the dind container after creating a tar with kaniko. We would like to avoid this by pushing with kaniko and creating the build info for the docker image.

This logic is somewhat replicating the jfrog rt build-docker-create command seen here:

https://github.com/jfrog/project-examples/tree/master/kaniko-example#kaniko-example

[github-actions]

CLA Assistant Lite bot All contributors have signed the CLA ✍️ ✅

[cwholmes]

I have read the CLA Document and I hereby sign the CLA

[cwholmes]

@eyalbe4 Could you please take a look at this change? My organization would really like to be able to support artifactory builds with kaniko. Thanks.

[eyalbe4]

Definitely @cwholmes!
Thanks so much for this contributions.
Give us just a few more days.

[yahavi]

@cwholmes,
Thanks for this contribution!
We recently changed the Artifactory clients to services-style attitude. Basically, it replaces ArtifactoryBuildInfoClient and ArtifactoryDependenciesClient by ArtifactoryManager and removes the HTTP client requests and responses handling.

Therefore before merging your PR, we should merge from the master branch and migrate to the Artifactory manager.
Would you like to pull the latest changes from the master branch?

You can use this as a reference to help you merging the BuildDockerCreate class: cwholmes@1cd2fe6

Please let us know if you encounter any difficulties.

[cwholmes]

@yahavi I have made the requested changes and used the artifactory manager.

[yahavi]

@cwholmes,
Thanks again for your contribution. We merged this PR to give you the credit and respect you're truly deserved.

I'd like to let you know that we elevated your PR to support both Kaniko and JIB.
We are working on follow-up PRs to add this support in the Jenkins Artifactory plugin:

• Add support for Kaniko and JIB #512 - this PR is a direct follow-up for your PR. It fixes fallen tests and adds support for JIB.
• Introduce create Docker build command jenkins-artifactory-plugin#503 - This PR introduces the Build Docker Create commands in the Jenkins Artifactory plugin. See usage in this PR.

We'd appreciate any feedback/review/thoughts before we merge the above PRs.