[Feature Request] Support multiple image tags

[gainings]

We are using docker buildx bake to generate multiple Docker images from a single Dockerfile. We want to perform a Sysdig scan on all the generated images.

However, the current implementation only accepts a single value for the image-tag parameter, requiring us to write the same step multiple times.

Therefore, we would like to request support for scanning multiple images by allowing the image-tags argument to accept multiple values.