Improve FindDockerImageUses recipe with multistage files and gitlab-ci files

[jevanlingen]

What's changed?

Use the new IMAGE reference type to improve the FindDockerImageUses recipe. The updated recipes has proper support for multistage dockerfiles and yaml files with an image key (for example a .gitlab-ci file).

What's your motivation?

Run one find (and replace?) recipe to search for your docker images in one go, no matter how the image has been configured.

Note

Notice the IMAGE reference type is also newly introduced in:

• Add Docker Image reference, to be used for gitlab, docker, etc rewrite#4793

Any additional context

This work is a step-up for integration of more ImageProviders. For example, testcontainers is also a project which uses images.

Checklist

• I've added unit tests to cover both positive and negative cases
• I've read and applied the recipe conventions and best practices
• I've used the IntelliJ IDEA auto-formatter on affected files

[jevanlingen]

Notice build will fail until

• Add Docker Image reference, to be used for gitlab, docker, etc rewrite#4793

will be merged!

[timtebeek]

Approved already. Ready to merge once the final question is answered.