googlecompute-export - Update default image or make it configurable

[benjben]

Overview of the Issue

Hard coded source image doesn't exist any more.

googlecompute-export uses debian-9-worker image family in project compute-image-tools.

However, there is no image any more in this family:

 ~ gcloud compute images list --filter debian --project compute-image-tools
NAME                                PROJECT              FAMILY                  DEPRECATED  STATUS
debian-11-worker-v20241210          compute-image-tools  debian-11-worker                    READY
debian-12-worker-arm64-v20241210    compute-image-tools  debian-12-worker-arm64              READY
debian-12-worker-v20241210          compute-image-tools  debian-12-worker                    READY
debian-11-bullseye-v20241210        debian-cloud         debian-11                           READY
debian-12-bookworm-arm64-v20241210  debian-cloud         debian-12-arm64                     READY
debian-12-bookworm-v20241210        debian-cloud         debian-12                           READY

Reproduction Steps

Use googlecompute-export

Plugin and Packer version

Packer version : 1.11.2

Operating system and Environment details

Ubuntu 22.04 in Github Actions

Log Fragments and crash.log files

==> googlecompute (googlecompute-export): Exporting image snowplow-mini-0-22-0-rc2-large-1734689425 to destination: [gs://snowplow-mini/snowplow-mini-0-22-0-rc2-large-1734689425.tar.gz]
==> googlecompute (googlecompute-export): Creating temporary RSA SSH key for instance...
==> googlecompute (googlecompute-export): Error getting source image for instance creation: Could not find image, debian-9-worker, in projects, [compute-image-tools]: 1 error(s) occurred:
==> googlecompute (googlecompute-export): 
==> googlecompute (googlecompute-export): * googleapi: Error 404: The resource 'projects/compute-image-tools/global/images/family/debian-9-worker' was not found, notFound

Full error can be found in the Github Action here.