Chainguard annotations are, but should not be, propagated to multi-platform manifest #1231
Description
When I ko build a multi-platform manifest, my manifest ends up with annotations attributing it to chainguard. Here is what I found:
{"org.opencontainers.image.authors": "Chainguard Team https://www.chainguard.dev/",
"org.opencontainers.image.base.digest": "sha256:fce1fdce595332afe7f339303ae288c349c4e4139d926f8c7ccf4b7ca2911553",
"org.opencontainers.image.base.name": "cgr.dev/chainguard/static:latest",
"org.opencontainers.image.source": "https://github.com/chainguard-images/images/tree/main/images/static",
"org.opencontainers.image.url": "https://edu.chainguard.dev/chainguard/chainguard-images/reference/static/"}