Add support for all-projects to incus image list and API

[stgraber]

Similar to instance listing supporting querying for all projects at the same time, it'd be useful to add that to the images API and CLI.

https://discuss.linuxcontainers.org/t/incus-image-list-columns/18711

[MaheshPunjabi]

Can I try ?

[stgraber]

sure!

I assigned it to you.

[stgraber]

For this one, you're going to want to:

• Add a new API extension to both internal/version/api.go and doc/api-extensions.md, let's call it images_all_projects
• Add support for all-projects to cmd/incusd/images.go for the imagesGet function. You can find examples of detecting all-projects in cmd/incusd/storage_volumes.go, cmd/incusd/network_allocations.go, cmd/incusd/instances_get.go, cmd/incusd/events.go and cmd/incusd/operations.go. This should also include adding the all-projects to the swagger comments on imagesGet.
• Re-generate the swagger YAML data (make update-api).
• Add a new GetImagesAllProjects function to client/incus_images.go and add that function to the ImageServer interface. Implement it in client/simplestreams_images.go as an alias for the standard GetImages.
• Add the new argument to cmd/incus/image.go, when passed, call GetImagesAllProjects instead of GetImages.
• Re-generate the translation template for the new CLI string.

The resulting set of commits will likely be:

• api: images_all_projects
• incusd/images: Add support for all_projects
• doc/rest-api: Refresh swagger YAML
• client: Add GetImagesAllProjects
• incus/image: Add --all-projects flag to list
• i18n: Update translation templates

[MaheshPunjabi]

Follow up question: do we want to add a column for 'project' in the output ?

[stgraber]

Ah yeah, when --all-projects is passed, a project column should be added, same thing we do with incus list --all-projects.