Remove authentication for accessing information already available through the web UI

[arturo-seijas]

Hi!,

We are running several checks in our CI that currently require a charmhub token to authenticate. This limits community contributions given that forks would require their own token.

The operations we are executing are currently list-lib and fetch-lib, which expose information that is already publicly available. Could authentication be removed from these? Also, it would probably make sense to do the same for querying revisions, resource-revisions and status.

Thank you!

[arturo-seijas]

I'm closing this since I've filed https://bugs.launchpad.net/snapstore-server/+bug/2023278