[Core feature] Imagespec Support for ContainerTasks, V1Container, SparkTasks

[zeryx]

Motivation: Why do you think this is important?

Image spec is good actually! It's very convenient for being able to quickly ensure that dependencies are updated - however it currently only is supported by PythonTask types.

Goal: What should the final outcome look like, ideally?

The goal would be that I could pass an imagespec variable to container_image within a ContainerTask or inside of a PodTemplate (V1Container object), which would get parsed at registration time with the correct image being attached to the container.

Describe alternatives you've considered

Copying a hardcoded image registry path ("some/path:latest") does work, however it completely removes the version control capability that imagespec offers. This also makes it hard to make incremental updates to a project, as older cached versions with the same image registry may still be around on a worker machine - which may lead to unexpected behavior.

Propose: Link/Inline OR Additional context

https://flyte.org/blog/flyte-1-8-enhanced-imagespec-integrations-and-more

Are you sure this issue hasn't been raised already?

• Yes

Have you read the Code of Conduct?

• Yes

[Kota-Karthik]

hello @zeryx @samhita-alla
I am interested in doing this issue
so kindly assign me this
Thank You : )

[samhita-alla]

@Kota-Karthik, are you working on creating a PR for this issue?