Align with community image overrides format

[seaneagan]

Problem description (if applicable)

The charts in this repository have an image overrides format which uses a format such as:

https://github.com/airshipit/charts/blob/510ead0632c880e8bb61cff55fa1f0077bf4bcaf/charts/dex-aio/values.yaml#L7-L10

instead of the more common format from the community:

https://github.com/prometheus-community/helm-charts/blob/5f585df3bc13ab525f3841638f939f9fab018ecf/charts/kube-state-metrics/values.yaml#L3-L6

the versions catalog attempts to smooth over the differences:

airshipctl/manifests/function/airshipctl-schemas/airshipit.org_versionscatalogues.yaml

Lines 169 to 180 in 7cfffde

	name:
	description: Name is an optional property that is used to
	specify the name of an image. Typically, this format is
	only needed for charts such as dex-aio, which uses "repo",
	"name", and "tag" properties to declare images, rather than
	the more commonly used "repository" and "tag". In such cases,
	"repository" should contain only the name of the repository
	(e.g. "quay.io") and the "name" property should contain
	the image name (e.g. "metal3-io/ironic").
	type: string
	repository:
	type: string

but the "repository"/"repo" difference means that replacement rules can't simply plug in all the images with a single rule, and instead rules for each image/field are needed:

https://review.opendev.org/c/airship/treasuremap/+/791835/25/manifests/function/dex-aio/replacements/update-dex.yaml#30

Proposed change

One of the following:

1. rename the "repo" field to "repository", this will allow for a single replacement rule for these charts via the same format as other community charts. Could consider also eliminating the "repository" / "name" split if we want to be further aligned.
2. Update the versions catalogue schema to separate out these different formats under two different keys e.g. image_components and image_components_airship.

Potential impacts

If we go with 1. then any consumers of these charts will need to be updated to match the new name.

[vetbijaya]

Can someone assign this to me? Thank you.

[eak13]

@vetbijaya all yours

[seaneagan]

@vetbijaya i guess airshipbot is not working, here is the patchset i have for this: https://review.opendev.org/c/airship/airshipctl/+/795702

[vetbijaya]

@seaneagan, seems like that, thank you for checking.