Remove access to pipeline images on gcr.io

[afrittoli]

Catalog images may need to be preserved from some more.
We need to look into catalog task deprecation to ensure we're not breaking folks without notice.

The Jenkins X project has asked we keep access to these for some time:

• gcr.io/tekton-releases/github.com/tektoncd/pipeline/cmd/controller:v0.42.0@sha256:1fa50403c071b768984e23e26d0e68d2f7e470284ef2eb73581ec556bacdad95
• gcr.io/tekton-releases/github.com/tektoncd/pipeline/cmd/resolvers:v0.42.0@sha256:eaa7d21d45f0bc1c411823d6a943e668c820f9cf52f1549d188edb89e992f6e0
• gcr.io/tekton-releases/github.com/tektoncd/pipeline/cmd/webhook:v0.42.0@sha256:90989eeb6e0ba9c481b1faba3b01bcc70725baa58484c8f6ce9d22cc601e63dc
• gcr.io/tekton-releases/github.com/tektoncd/pipeline/cmd/git-init:v0.27.0