A new image is created for every tag

[jsilverio22]

A new image is created for every tag refactor image creation to include a list of tags/reference

[thedadams]

Reproduced on Acorn v0.4.2:

1. Built an image using acorn build -t asdf .
2. Tagged this image using acorn tag 614ae13a6fe9 asdf:v1
3. Request images using kubectl -n acorn get images.api.acorn.io and saw two entries:

REPOSITORY   TAG      IMAGE-ID
asdf         latest   614ae13a6fe9
asdf         v1       614ae13a6fe9

4. Deleting one image via acorn image delete asdf deleted both images.

On the latest version of Acorn:

1. Built an image using acorn build -t asdf .
2. Tagged this image using acorn tag db6650d775f9 asdf:v1
3. Request images using kubectl -n acorn get images.api.acorn.io and saw only one entry with two tags:

IMAGE-ID       TAGS
db6650d775f9   asdf:latest,asdf:v1

4. For completeness, I also requested the imageinstance via kubectl -n acorn get imageinstance db6650d775f903fc18c1c49ab319c6eba261845187e4ba8ffdf1b4e819253b34 -o yaml and saw the tags there, too:

apiVersion: internal.acorn.io/v1
digest: sha256:db6650d775f903fc18c1c49ab319c6eba261845187e4ba8ffdf1b4e819253b34
kind: ImageInstance
metadata:
  annotations:
    apply.acorn.io/applied: H4sIAAAAAAAA/5zNyw2DMAwA0F185oDJP3N0AcdxWiQSEElPiN2rqht0gfcuyOtT+oAI/UWLsTEna82cnTMlzKowekbWgZLCwFYSLRa9Nuid6ES+lFwwafHo0fmgnYMJqgzKNAjiBXwKjXVvj7VKH1QPiO29bRM0qgIR/v7CYlRSGn5SP4i/HPF+NrjvTwAAAP//M4WaBdkAAAA
  creationTimestamp: "2023-01-10T19:04:06Z"
  generation: 3
  name: db6650d775f903fc18c1c49ab319c6eba261845187e4ba8ffdf1b4e819253b34
  namespace: acorn
  resourceVersion: "1466"
  uid: b0a38ea5-d85f-4776-9947-f5a65fe2650a
tags:
- asdf:latest
- asdf:v1

5. Deleting an image tag via acorn image.api.acorn.io rm asdf:v1 only removed the corresponding tag from the above two requests:

IMAGE-ID       TAGS
db6650d775f9   asdf:latest

apiVersion: internal.acorn.io/v1
digest: sha256:db6650d775f903fc18c1c49ab319c6eba261845187e4ba8ffdf1b4e819253b34
kind: ImageInstance
metadata:
  annotations:
    apply.acorn.io/applied: H4sIAAAAAAAA/5zNyw2DMAwA0F185oDJP3N0AcdxWiQSEElPiN2rqht0gfcuyOtT+oAI/UWLsTEna82cnTMlzKowekbWgZLCwFYSLRa9Nuid6ES+lFwwafHo0fmgnYMJqgzKNAjiBXwKjXVvj7VKH1QPiO29bRM0qgIR/v7CYlRSGn5SP4i/HPF+NrjvTwAAAP//M4WaBdkAAAA
  creationTimestamp: "2023-01-10T19:04:06Z"
  generation: 4
  name: db6650d775f903fc18c1c49ab319c6eba261845187e4ba8ffdf1b4e819253b34
  namespace: acorn
  resourceVersion: "1512"
  uid: b0a38ea5-d85f-4776-9947-f5a65fe2650a
tags:
- asdf:latest

6. Added the tag back and deleted the image via acorn image rm db6650d775f9 and received this following error as expected:

Error: deleting db6650d775f9: unable to delete db6650d775f9 (must be forced) - image is referenced in multiple repositories

7. Delete the image via acorn image rm -f db6650d775f9 and saw that the corresponding Kubernetes objects were deleted.