cleanup: Further remove docker.io registry

[gauron99]

There are some internal images that are hosted at docker registry. We need to remove that dependency.

• pack builder lifecycleimage will be mirrored (most likely) into the ghcr registry

  func/pkg/builders/buildpacks/builder.go

  Line 117 in 8ab6083

  var DefaultLifecycleImage = "docker.io/buildpacksio/lifecycle:553c041"

• rust paketo image

  func/hack/cmd/update-builder/main.go

  Line 575 in cad00d7

  BuildpackURI: dist.BuildpackURI{URI: "docker://docker.io/paketocommunity/rust:0.47.0"},

• python base image (pkg/oci/python_builder.go being added in PR Python Middleware v2 Scaffolding #2685)

(if you find more, feel free to add a comment or edit this text)
/assign

[matejvasek]

rust paketo image

That's only used when building builder. Then it's baked into our builder hosted at ghcr.io, so func user is not pulling docker.io/paketocommunity/rust:0.47.0.

[matejvasek]

Related #2775